https://bugs.winehq.org/show_bug.cgi?id=52283
--- Comment #26 from jrelvas@proton.me --- Another status update: This bug does not seem to be present with wine's Vulkan renderer (via DXVK or native vulkan), but the lack of childwindow support means that said renderer cannot be used unless an external patch is applied. (I think this pretty much confirms the issue is within d3d)
For anyone running mainline Wine, Roblox Studio is practically impossible to use unless you don't use the majority of its tools.