ᐅ Drywall on OSB boards, cracks?

Currently, the attic floor consists of OSB boards.
The walls and ceilings will be covered with gypsum board. Both an architect and the drywall installer said this is a very good combination.
Because of a minor issue, I started researching and found a lot of contradictory information out there.
Among other things, it is said that the expansion rates of OSB and gypsum board are so different that cracks often occur.
I don’t want to believe that. 😎

My question:
Is there anyone here who has cracks in the gypsum board that can be traced back to the OSB substrate?

I will never understand why summer heat protection in the roof is often neglected, but as explained, the OSB board will absorb water vapor. Depending on how much vapor accumulates, the wood will start to swell, which can cause cracks in the drywall.

.... what do you mean by the "unfulfilled, summer thermal protection"? The roof is heavily insulated and there are large awnings over the big south-facing windows.

Yes, the fact that this CAN happen is exactly the concern from the internet.

My question regarding this is:
Is there anyone who knows this problem from personal experience?

Joints in drywall can generally be problematic—regardless of the substrate. We have occasional hairline cracks here and there (even with drywall on stud framing). It’s not just moisture that plays a role, but also potential movements in the building structure. I believe this can be minimized if necessary by using appropriate joint tapes on the drywall. However, I cannot confirm any particular tendency of OSB panels to warp, stretch, swell, etc. in our case.

Thank you

The drywaller I happened to run into while shopping (small town, after all) assured me once again that he has it "under control." Expansion joints with acrylic and joint tape in the right places ... and "it will be fine."

I'm not changing the planned approach anyway ... I was just uncertain.

What should go on the drywall?