As title suggested, they are halfway themselves and still have their collision intact, they have to retracted first.
The retractables that aren't exempt of this are:
- Grapple Logs
- Hammer Posts
- Floor Spikes
To do the bug itself, you must RETRY (Checkpoint) before entering the room.
these retractables won't bug itself if there's few of them, but if there's like many of them alongside with other retractable properties, it would just bug out.
If you enter the room first then retry, it somehow doesn't bug out like I previously mentioned.
TLDR:
- Retry Checkpoint first, enter room second, bug third.