@Jeremy259041676ecb@SpingogogoI think I have discovered the cause and possibly the solution to this bug.
It appears to occur when your restored/non-maximized window state is small enough that the toolbars cannot be expanded (see attached) so they are all minimized (even if you reset your profile). You can then go maximized and restore your profile, but then next time you launch PS it appears to remember the collapsed state that those toolbars were in (even if it launches maximised). I'll try and explain, see if you guys can recreate the same:
1 - Open PS and click on the 'restore' button (top right, next to close) and see if the PS window is now so small that the toolbars are all minimised (like the attached)
2 - Drag this out further and then reset your profile (your toolbars should all now be as expected)
3 - Close PS
4 - Relaunch PS, it should open with the same window size as it did when you closes it, now maximise the window and reset your profile again
5 - Close and Re-open PS. It should now open fullscreen with your saved layout!
Let me know if that works for you
Cheers