I don't know the conditions needed to recreate this bug, but I have also experienced this issue while a passenger of a boat during the 1.17 development cycle.
Distro: Linux Mint 19.3Kernel: 5.3.0-53-generic x86_64CPU: Intel Core i5-4690KGPU: Radeon HD 7950Java: openjdk version "11.0.7" 2020-04-14
Happens with clouds, and rain.
I don't know the conditions needed to recreate this bug, but I have also experienced this issue while a passenger of a boat during the 1.17 development cycle.