Bowens GM500R display upside-down all of a sudden?

For some reason, while using my Bowens flash mono block heads today one of them just suddenly started showing the digital display on the side of the head upside down. No idea why, everything else works fine apart from this. Any other Bowens users experienced this strange upside-down display phenomenon and what the fix is?
I figured I could try to pop the display out and pop it back in upside-down, rectifying the issue, but I'd rather know what caused it and how to fix it correctly.
I figured I could try to pop the display out and pop it back in upside-down, rectifying the issue, but I'd rather know what caused it and how to fix it correctly.