https://bugs.winehq.org/show_bug.cgi?id=51885
--- Comment #3 from nekoNexus@protonmail.ch --- An update on this: I found that having a symlink inside of the ~/.local/share/applications directory pointing to a location with another Wine prefix causes this terminal spam.
However, there's another connected issue with this I noticed: Wine tries give advice on how .desktop files are written even when they have no relevance to Wine itself, if it finds there's something it doesn't like about them.
Additionally, in Konsole and Yakuake, Wine has a tendency to overflow into the user's input "line" after executing certain Wine tasks (such as running some programs, installing dotnet, running winecfg, etc) and this behavior is intrusive to the terminal (might be connected to why, in the original post, Wine output was flooding other terminal programs such as nano when it shouldn't have been)