Vanilla server.
The server will hang until Watchdog force closes the server (60s). Rarely will the hang resolve itself.
Not all underwater chests seem to have the issue, one time it resolved by spamming right click, and another when breaking a block next to it, but both could just be a coincidence.
Server seed 5240653459355662379
Environment
Minecraft Version: 1.14.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_211, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 93484208 bytes (89 MB) / 976224256 bytes (931 MB) up to 976224256 bytes (931 MB)
JVM Flags: 2 total; -Xmx1024M -Xms1024M
Player Count: 2 / 20; [vh['************'/81, l='world', x=1378.11, y=62.07, z=-2210.97], vh['******'/1739, l='world', x=1280.63, y=56.18, z=-2193.56]]
Data Packs: vanilla
Is Modded: Unknown (can't tell) (no)
Type: Dedicated Server (map_server.txt)
Duplicate of MC-138550