@akiva silver
For the moment, My ram I use when I play is about 5 Go on 16 Go available (32% busy) I don't think It's a ram allocation problem.
I tried to update both Graphic card and all my update is up to date.
I have put my "View Bobbing" to OFF, but it still happen.
I'm playing on a Minecraft Realms (mine)
Realm's name : Duke's Realm
This phenomen appears after creating a long redstone circuit. That's is the only related thing I found.
@akiva silver
How do I set it to default ?
I looked in MineCraft options, but I didn't find anything about changing RAM allocation.