Analog four OS 1.5 upgrade

I have upgraded my A4 mk2 to OS 1.5 and when I turn on the power the screen gives me the normal startup-info, but just before it is ready to be played all the LEDs are red and the screen is black (maybe for a second) and then it is playable as it’s supposed to. Is this another bug?
Before I upgraded, when OS was 1.40 this did not happen - it went straight from the “welcome” screen to playable.

It’s a bug, they are aware of it and should be fixed in next update coming soon

Ok, I work as a software developer and testing is a BIG part of development. Well, an update is good:)