https://bugs.winehq.org/show_bug.cgi?id=15153
--- Comment #14 from Esme Povirk madewokherd@gmail.com --- SetData is an implementation of this method: https://docs.wxwidgets.org/trunk/classwx_data_object_simple.html#a064b6e42ce...
It seems the assumption is that this will only be called when data is dragged from the program's own drag source, which uses a specific structure of known size. That all should be fine, but I guess somehow the data is getting lost?