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