In 2018 the GPD XD Plus was released and it had a vulnerability. The case tends to break at the hinge. This could be because the plastic is too weak or because the hinge was assembled too tight, or it could be a combination of both. I believe it has to do with the hinge only. If you are able to loosen the hinge then I think that your XD Plus will be fine.
In 2019 the newer case was released and I have only seen one case that had the hinge crack, but I strongly believe it is because the person had dropped it right on the hinge. So it seems that GPD fixed the problem.
I made this video to help people that still have a 2018 version of the XD Plus and wish to loosen the hinge to try and prevent the case from breaking.
In this video I tighten the XD ( Gen 1 ) because the hinge was too loose. Just make sure and turn the bolt counter-clockwise if you wish to loosen the hinge.
I hope this helps you guys. Enjoy!