Apps have problems executing in collapsed mode but not in normal mode

In collapsed mode of app finder, some apps do not open at all giving the "No such file or directory" error, or the file that is meant to be executed is opened selected in Thunar.

kamil$ls Opt 
abaddon  MeshLab2023.12.AppImage  Obsidian-1.8.9.AppImage  qbittorent-5.1.0.AppImage  tutanota.AppImage

Above confirms the right filename. It's /home/kamil/Opt directory. I also added this path to $PATH and app is still not found. I tried both relative and absolute paths.

kamil$echo $PATH
/home/kamil/Opt:/usr/sbin:/home/kamil/.local/bin:/home/kamil/.cargo/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games

E.g with Meshlabs and qBittorent which are also contained in the ~/Opt directory and an .AppImage, it opens thunar with the executable selected. Obsidian gives path not found error.

All apps have in common that they are stored in this directory – either AppImage or built from source. The apps launch fine in normal mode, but not in collapsed mode.

I have ran into this problem and discussed it on the forum. Therein is a detailed discussion, here I'm condensing the problem.