silverfish and drowned zombies with trident spawn even if monsters are disabled

Thank you for your report!
We're tracking this issue in MC-263974 and MC-302983, so this ticket is being resolved and linked as a Duplicate.

Please stop reporting the same issue over and over. This does not contribute towards it being fixed.

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Sorry i could not find duplicate. I thought that it needs to be fixed. I think that you forgot to code silverfish and drowned zombies out of gamerule spawn monsters false