[2023] wetlands?

Can you show a screenshot / video of what you mean? While an interesting idea, there is actually no such intentional feature implemented.

No - I also cannot reproduce this in Update 10 playtest either, though, hence the question.

You're playing on a staging build, which is heavily in development, we don't accept any reports for that, only developer tier users should be able to play that anyway. The only publicly intended version is the playtest branch. That explains why it doesn't happen for me, though, so thanks for that info :)