Visual glitches on DH 2.3.0-B-RC1 1.21.1 FABRIC

Hello, i have these visual glitches on a server
I tested other servers, no problem
I tested on this server on the "welcome map" (separate server i think) and no problem
It seems to be the map itself

I deleted "Distant_Horizons_server_data" folder and config and i still have the problem

my MC render distance is 2

my distant horizon distance is default

Thanks you