Here is something a bit annoying with OO on windows.
OO is pinned to my taskbar.
What I observe is that in the jump-list I get with a right-click on OO’s icon, I don’t get the last opened files, but “some” files I opened before.
This impression is confirmed by the fact that when I open the Onlyoffice Editors app, in the Recent Files section, I here see the last opened files:
Could it be possible for you to spend some time on this ?