[MC-187956] Zombies Spawning in water

I was on an outdated server with 20w22a

A zombie spawned underwater in the ocean

affects versions 20w22a

doesn't seem to affect 1.16prerelease2

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Thank you for your report!
However, this issue is Invalid.

Your game, launcher or server is modified.
If you can reproduce the issue in a vanilla environment, please create a new ticket.

Any non-standard client/server/launcher build needs to be taken up with the appropriate team, not Mojang.
Any plugin issues need to be addressed to the creator of the plugin or resource pack.
If you have problems on large servers, such as The Hive and Hypixel, please contact them first as they run modified server software.

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I created this server and it is a vanilla server

no data packs installed on the server

a) Your game is modified on the client side.
b) 20w22a is outdated and no longer supported.