it seems that at high viewing angles of partly transparant textures such as grass or leaves causes the transparency to be replaced by black.
this only occurs when mipmap levels are set to one or more
the higher the mipmap level the more pronounced the effect is
Interesting note this does not occur with glass or varients there of
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It seems this is basically MC-114265 but way more severe. Marking as related.
Thank you for your report!
We're tracking this issue in MC-218609, so this ticket is being resolved and linked as a duplicate.
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I also have this issue I was about to report it but I saw this report.
I also experienced this issue