Thank you and I understand that trying to replicate issues can be difficult due to so many parameters related to hardware/software unique to a user.
Hopefully that wish could be implemented, would be useful for all and Xbox users in particular to help troubleshooting:
If missing, that addon is known to generate artifacts around boats but I don’t think your issue is related to that.
In your case, since issue started with CU9, it tends to indicate that one of your addons has a conflict with what has been implemented in that update.
Have you check if all your addons are up to date ?