Rain continues to fall through blocks, which was also a bug in the 1.16 snapshots. That bug was resolved, but if you did not play on the snapshot in which it was resolved, it seems that the bug still exists in 1.16.1 with blocks which were placed in the snapshots. It does not seem to happen with new blocks that have been placed in 1.16.1 - only items placed before the update.
Environment
macOS Catalina, world was started in the first 1.16 snapshot.
Linked issues
Attachments
Comments 2
MC-179845 actually.
Please follow the instructions in the moderator note on that report, and in the future, please be more vigilant when using early development versions of the game and use the search engine to see if anyone else has reported this already (and do not just look for "Unresolved" reports).
Duplicate of MC-163575