Lighting issue

Attached are screenshots of coordinates [-9713.7, 74, 10230.7] for seed 2952352923753510649. Screenshots attached to display client information and odd lighting effect - otherwise gameplay works well.

The server environment information: Ubuntu 18.04.4 LTS / kernel 5.6.0 x86_64 / java 14 2020-03-17 / Java(TM) SE Runtime Environment (build 14+36-1461) / Java HotSpot(TM) 64-Bit Server VM (build 14+36-1461, mixed mode, sharing) / Minecraft Server Snapshot 20w15a / AWS t2.small EC2 instance / 2GB swap

JAR init : java -server -XX:+UseG1GC -XX:MaxGCPauseMillis=100 -Xmx1625574K -jar 20w15a.jar nogui