https://bugs.winehq.org/show_bug.cgi?id=46385
--- Comment #5 from Van winebugrpt18356@fastmail.jp --- Okay, I installed TreePad X Enterprise (single user) 12 GB v7.17.0 in a regular WINE environment and the copy and paste issue does not exit. So, there appears to be an issue with copying and pasting outside of TreePad within a WINE prefix under WINE 4.x.
I will next test creating a new WINE prefix for TreePad, install a new instance of TreePad into the new WINE prefix, and test copying and pasting from there to verify whether or not there's an issue with copying and pasting within a WINE prefix in WINE 4.x.