Uber eater of worlds tentacle slam does damage even after slamming

Today I just ran 6 uber eater of worlds with a squish build just practicing. I noticed that the tentacle slam (mostly during the inescapable doom phase) still oneshot me after the slam is finished, while the tentacle is returning into the ground. Like 60% of the length is already in the ground, it still does damage when I walk over it. This happens over 10 times in my 6 practice runs.

I attached a screenshot on when the tentacle still hitting. I didn't record my gameplay this is just a screen cap from a youtube video.

Is this behavior intended? This is so weird. I checked some videos in youtube and it doesn't seem to happen (or they just didn't stand exactly on the retreating tentacles like I did).

My character has 4.8k health with determination, the 97 deadeye in Sanctem league on my profile. POB: https://pastebin.com/Lht2dSBc

I believe it has always been like this, the tentacle dragging back into the ground has always been able to hit; it does multiple hits over a short period of time
what would be a bug would be if the hitboxes were not correct and if you were being hit while there was no tentacle there, although from my runs this doesn't seem to be the case