Cliffs of Moher - autogen trees suddenly sprouted everywhere

Do you have the same issue if you follow the OP’s steps to reproduce it?

Yes

Provide extra information to complete the original description of the issue:

Could whatever has caused this be the root cause of this bug too (speculation)?:
Arthur’s Seat hill (Edinburgh) covered in trees - Bug Reporting Hub / Scenery and Airports - Microsoft Flight Simulator Forums

Partial Specs & current settings:
Build: SU15 (v1.37.19.0)
3rd-Party Addons: None, Community Addons: None
MSFS Version: MS-Store, Standard, plus All World and City Updates

If relevant, provide additional screenshots/video:

Same view as shown by @DementedCorn327, above.