Steps to reproduce: 1. With no project open, open some files 2. Open project A 3. Without closing project A first, open project B 4. Close project B 5. The originally open files from (1) are gone

Note that simple 1. With no project open, open some files 2. Open project A 3. Close project A

restores the session correctly.

I was wondering whether some of the session-split patches caused this but I checked out Geany 1.35 and it contained the same bug. I haven't investigated more so far.