I must admit. I thought this was just a bunch of whiner baloney so I run a test.
Dusted off the game after couple of weeks (not playing it until fixed) and run couple of tests using a portion of The Black Death.trk.
Results:
With logo current: 50, average: 44, maximum: 64, minimum: 7
Without logo current: 55, average: 51, maximum: 69, minimum: 10
All max @ 5760 x 1080
Another blatant bug resolved by the community and ignored by developers.
Reported!