Seems a bit like a hardware issue.
But I’d probably try putting the nightghost minimosd-extra on it and see if that makes any difference.
as per this:
https://discuss.ardupilot.org/t/minimosd-bug-or-feature/29319/3?u=xfacta
I’m using this Hobbyking one:
It wasnt the cheapest around, but it is working as planned.