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?
AC 28 USA and earlier • macOS Sequoia 15.3, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB
One of the forum moderators