Your screenshots tell us you're on a Mac... so what version of MacOS are you on? What version and build of ARCHICAD is this happening with (About dialog)? Is your file being stored locally, or on a network... or in a synced folder (e.g., Dropbox etc - which is not recommended)?
If you do a "Save" (or cmd-S), is a proper PLN saved? So, is this only happening if you Quit ARCHICAD after having made unsaved changes?
Have you called tech support?
One of the forum moderators
AC 28 USA and earlier • macOS Sequoia 15.2, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB