https://bugs.winehq.org/show_bug.cgi?id=48137
--- Comment #1 from Zhiyi Zhang zzhang@codeweavers.com --- Can't not confirm. Is it happening for you consistently? What's the wechat version you used?
I tested with the latest version 2.7.1.85. I do get a black window or an extra large tray popup window sometimes. But I saw those with older Wine versions before so I can't be sure that it's a regression.