I'd think German traffic engineers could come up with a better solution, yet these are everywhere:
The bike paths themselves are desire paths for cars and motorcycles.
To block them off, they put up barriers, but those also block cargo bikes, wheelchairs and strollers, create a collision hazard, and force all cyclists to stop and dismount for no reason.
Of course, they'll be bypassed wherever possible – naturally by cars and motorcycles too, if there's enough room.
The people who plan this bullshit grew up in a time whether there were only granny bikes. Actually, sometimes I think all traffic planning in Germany is being done by drunk chimpanzees.
Please don't underestimate drunk chimpanzees. They can use and invent tools!
Oh, I don't. They're very good at always finding the worst possible solution.