Do you have the same issue if you follow the OP’s steps to reproduce it?
Provide extra information to complete the original description of the issue:
I report a similar issue for LKMS airstrip in the Czech republic. It seems there is a global issue with trees after WU18 that should be fixed.
[Moderator Edit: The bug mentioned is:
LKMS Airstrip Suddenly Trees Around Everywhere]
If relevant, provide additional screenshots/video: