I don’t know if this is a change, but it didn’t used to work this way. I have 4 gear sets: single target DPS, multi-target DPS, dungeon tanking and raid tanking. I exported my data from the addon in to the website and ran best in bags. For single target DPS, the optimizer says I should enchant my Warmace of Waking Nightmares with critical strike. And then for multi-target DPS, it says I should enchant it with versatility.
It still works great, this just seems like a bug. I’m not going to re-enchant my weapon every time I switch between single and multi-target DPS. 
Thanks,
Korra
My first setup is single target DPS (windwalker). Talents are 2322112. Major essence is conflict and strife. Epic gems, all enchants, 0.25% gem+enchant and azerite thresholds. No limit on on-use items. Only In Nyalotha checked, 39 corruption max.
My second setup is multi-target DPS (windwalker). Talents are 3322132. Major essence is essence of the focusing iris. Epic gems, all enchants, 0.25% gem+enchant and azerite thresholds. No limit on on-use items. Nothing checked, 39 corruption max.
Here’s my export string from the addon:
86;US;Zul'jin;Korraavatar;Dead End Friends;13;2;120;81;13:190,15:838,12:175,1:175,3:175;3;.s1;16;1211111;0.12.4_1.25.3_2.32.3_3.37.3;.s2;17;;;.s3;18;2322112;0.32.3_1.12.4_2.28.4_3.35.3;.q1;155881s13b42b1605b3139b1727b23;2194s2b-4904b3300b1b1383;287s12b-4704b3172b18b208b840x168642e6111;933s8b-4208b3144b1729b17b34b12b1;4s3b-4932b3128b11b662b1064a287055a-470a-22598a4612a-4621;1s9b-4865b3139b1729b21b4b38b1;25s6b-4942b3149b1727b3b18;292s14b-4892b3144b1727b19;3820s10b-4895b3149b339b1388b3;3122s11e-169;17s5b-4939b3198b11b1059b662a8814a14870a-7763a-11300a-4621;2647s15b-5035b4810;3376s7b-6241b1516b3229b16b1585b1x-3;157s16b-4836b3234b1601b2e6;1376s1b-4887b3273b11b37b1685a14591a38568a-53150a4450a-4459;.q3;158075s2b1632b3300b1b1383;239s11b-4684b3154b16b1711b3b16x168642e6111;48s12b-4920b3172b18b208b840x0e0;937s3b-4203b3128b11b662b1064a287055a-470a-22598a4612a-4621;1s9b-4865b3139b1729b21b4b38b1;28s10b-6537b1570b3172b18b208b850x0;8s8b-4248b3172b18b208b845x-3;281s14b-4213b3144b1727b19;9606s15b-5060b4810;2963s17b-4780b3284b37b1692b1e-149;413s7b-6475b1516b3229b16b1585b1x0;845s6b-4901b3299b17b1609b101b26b39b1;499s13b-5077b3284b37b1692;162s16b-5013b3284b37b1690b3e3;26s5b-5014b3273b11b37b1684a15940a37219a-50957a-2218a16;1s1b-5005b3273b11b37b1685a15940a37219a-49472a772a-4459;.ess;2_3;3_2;4_4;5_3;6_4;7_3;12_4;13_3;14_3;15_3;16_2;17_4;18_2;19_3;20_3;21_3;22_3;23_2;24_3;25_3;27_3;28_4;32_3;33_3;34_2;35_3;36_2;37_3;.inv;2459;442;4047;4343;10586;1695;905;1;38313;416;146;1921;5809;551;14509;6598;5974;11845;5855;1;1;1;3;3836;3867;3631;598;584b733b784x133683y3624z6397p1502p2026p45q-2079q232q1611r-1850r337r1704;1b-785b814x8348y-15044z15285p-2041p2041p83q-2127q322q1722r-2016r1824r276;2b-812b826x3560y-3804z3804p-2130p2046p82q-2103q1830q274r-2109r1834r275;3574;3828;1300;844;1706;1254;159;5689;0;0;7;1;0;0;0;2;403;4789;9;1;2;1;1;1;1;1;28;1;1;2;2;29;1;2;52;37;0;0;0;0;0;382;390;260;1;3;1;415;2;1;1;40;1;557;166;9;2;0;982b-1518b1605b3139b1727b23;1913;395;1106b-4894b3144b1729b17b34b12b1;2b-4942b3149b1727b3b18;7b-4902b3154b1729b1b16;21b-4895b3149b1727b3b18;4b-4907b3159b16b206b1507b1x12789;630;94;0;0;0;245;181;1521;460;55;29b-4884b3154b1727b3b12;492;401b-4891b3149b339b1388b3;167;16;123;123b-4954b3224b339;1837;38;207;0;0;611e5942;17b-3548b3198b11b1059b662a272792a14870a-7763a-11300a-4621;162;108;0;124;0;0;0;1;584b-5020x-970y1079z-120p1175;7;176;447;4;1;1;1;1;118;0;3;0;0;13;0;162;160;2;0;151;30;68b30b3269b14e23;551;0;159;2909;144b-3243b3229b1577b25b125b53b12b1e143;36b-5022b3218b11b1600b3b115a14591a2012a-16473a4488a-4618;57b-4952b3234b1601b2e-160;32b-4862b3258b1472b95;2b-4815b3248b1730b26b37b1;2b-5042b3248b1728b3;2b-4979b3248b1730b1;569;0;0;0;0;769b-5014b3273b11b37b1685a14591a38568a-53150a4450a-4459;8b-5006b3284b37b1690b31b34b1;139;8;0;66;180b-5092b3299b36b1693b35b28b1;226;2;4;162
And the corresponding export string from the website:
bib
86;US;Zul'jin;Korraavatar;Dead End Friends;13;2;120;81;1:175,3:175;3;.s3;18;2322112;304121.32.3_299350.12.3_299377.28.3_311198.35.3;.q3;155881s13b42b1605b3139b1727b23t81;2194s2b-4904b3300b1b1383t146;287s12b-4704b3172b18b208b840t148x168642e6111;937s3b-4203b3128b11b662b1064a287055a-470a-22598a4612a-4621t149;1s9b-4865b3139b1729b21b4b38b1t150;28s10b-6537b1570b3172b18b208b850t151x0;1s7b-4233b3159b16b206b1507b1t88x0;7s8b-4904b3172b18b208b845t152x-3;281s14b-4213b3144b1727b19t153;9283s17b-5015b3269b14t127e-149;323s15b-3328b4810t154;2963s16b-4780b3284b37b1692b1t155e3;1945s5b-5014b3273b11b37b1684a15940a37219a-50957a-2218a16t160;1s1b-5005b3273b11b37b1685a15940a37219a-49472a772a-4459t161;8s6b-5006b3284b37b1690b31b34b1t138;393s11b-5092b3299b36b1693b35b28b1t143e146@MonkWindwalker1@DPS Single@e\6111\168449\297993\60 Versatility\152877=5,152876=4,152875=18@e\5962\159788\268852\Vers\152876=8,152875=20,152877=1@e\5965\159785\268907\Crit\152876=8,152875=20,152877=1
86;US;Zul'jin;Korraavatar;Dead End Friends;13;2;120;81;1:175,3:175;3;.s3;18;2322112;299338.5.3_304123.32.3_299377.28.3_311198.35.3;.q3;158075s2b1632b3300b1b1383t146;239s11b-4684b3154b16b1711b3b16t147x168639e6108;48s12b-4920b3172b18b208b840t148x3e3;937s3b-4203b3128b11b662b1064a287055a-470a-22598a4612a-4621t149;1s9b-4865b3139b1729b21b4b38b1t150;28s10b-6537b1570b3172b18b208b850t151x0;8s8b-4248b3172b18b208b845t152x-3;281s14b-4213b3144b1727b19t153;9606s15b-5060b4810t154;2963s17b-4780b3284b37b1692b1t155e-149;413s7b-6475b1516b3229b16b1585b1t156x0;845s6b-4901b3299b17b1609b101b26b39b1t157;499s13b-5077b3284b37b1692t158;162s16b-5013b3284b37b1690b3t159e3;26s5b-5014b3273b11b37b1684a15940a37219a-50957a-2218a16t160;1s1b-5005b3273b11b37b1685a15940a37219a-49472a772a-4459t161@MonkWindwalker2@DPS Multi@e\6108\168446\298009\60 CriticalStrike\152877=5,152876=4,152875=18@e\6111\168449\297993\60 Versatility\152877=5,152876=4,152875=18@e\5962\159788\268852\Vers\152876=8,152875=20,152877=1@e\5965\159785\268907\Crit\152876=8,152875=20,152877=1
86;US;Zul'jin;Korraavatar;Dead End Friends;13;2;120;81;1:175,3:175;1;.s1;16;1211111;299353.12.3_299277.25.3_304123.32.3_313920.37.3;.q1;155881s13b42b1605b3139b1727b23t81;2194s2b-4904b3300b1b1383t146;287s12b-4704b3172b18b208b840t148x168642e6111;933s8b-4208b3144b1729b17b34b12b1t84;4s3b-4932b3128b11b662b1064a287055a-470a-22598a4612a-4621t149;1s9b-4865b3139b1729b21b4b38b1t150;25s6b-4942b3149b1727b3b18t87;292s14b-4892b3144b1727b19t153;3820s10b-4895b3149b339b1388b3t100;3139s5b-4939b3198b11b1059b662a8814a14870a-7763a-11300a-4621t109;2647s15b-5035b4810t154;3376s7b-6241b1516b3229b16b1585b1t156x-3;64s11b-4831b3229b1577b25b125b53b12b1t130e-3;93s16b-5027b3234b1601b2t132e-160;1376s1b-4887b3273b11b37b1685a14591a38568a-53150a4450a-4459t137@MonkBrewmaster1@Tank Dungeon@e\6111\168449\297993\60 Versatility\152877=5,152876=4,152875=18@e\6108\168446\298009\60 CriticalStrike\152877=5,152876=4,152875=18@e\5948\153478\255110\Siphon\152876=5,152875=20,152877=1@e\5942\153442\255075\40 CriticalStrike\152877=8,152876=5,152875=20
86;US;Zul'jin;Korraavatar;Dead End Friends;13;2;120;81;1:175,3:175;1;.s1;16;1211111;300016.13.3_298083.2.3_299373.27.3_313920.37.3;.q1;155881s13b42b1605b3139b1727b23t81;2194s2b-4904b3300b1b1383t146;1220s8b-4674b3144b1729b17b34b12b1t84;2s7b-4942b3149b1727b3b18t85;2s3b-4887b3128b11b662b1064a287055a-470a-22598a4612a-4621t149;1s9b-4865b3139b1729b21b4b38b1t150;25s6b-4942b3149b1727b3b18t87;3s10b-6492b1570b3172b18b208b850t151x168642;289s14b-4218b3144b1727b19t153;2927s12b-4900b3154b1727b3b12t99e6111;6679s15b-5056b4810t154;3440s11b-4725b3229b1577b25b125b53b12b1t130e-3;36s5b-5022b3218b11b1600b3b115a14591a2012a-16473a4488a-4618t131;57s16b-4952b3234b1601b2t132e-160;1376s1b-4887b3273b11b37b1685a14591a38568a-53150a4450a-4459t137@MonkBrewmaster2@Tank Raid@e\6111\168449\297993\60 Versatility\152877=5,152876=4,152875=18@e\6108\168446\298009\60 CriticalStrike\152877=5,152876=4,152875=18@e\5948\153478\255110\Siphon\152876=5,152875=20,152877=1@e\5942\153442\255075\40 CriticalStrike\152877=8,152876=5,152875=20
