Issue is in some other, unrelated system component. It should be fixed there.

Relates to accessibility and accessibility technologies

Doing things via sodu / pkexec / etc as root

Link to real file instead of real file

Issues related startup and storing/restoring data from the last session

Anything related to the desktop bus interface

Issues related to style and color

Type ahead search, CTRL+F and pattern matching

Scrollbars and mouse scroll

Any type of file rearrangement like sorting and filtering

Wayland specific issue

Issues related to icon presentation, scaling and similar

Ghost files, missing files. Thunar does not show reality

Issues related to different file types and default applications for them

Related to shortcut keys and accelerators

Issue related to settings and configurable preferences

Browsing history, controlled with back and forward buttons

WM title bar and window borders or Client Side Decorations (CSD)

Any kind of issue related to the build process