Plastic disc flying off kickr

Hi, I have a pretty new Wahoo Kickr 18. I have found that the plastic cover on the left hand side of the fly wheel works loose and flies off. Does this matter? How do I stop it from happening?

Same thing on my trainer. Bad design I think. Either leave it off, or tape it on.
I have not decided what I will do, but I think I will leave it off.