THIS IS AN OPTIFINE BUG NOT A MINECRAFT BUG, PLEASE CAN THIS REPORT BE DELETED

I use optifine, I don't know if this is optifine or Minecraft related, or just my pc

Some hostile mobs on my singleplayer have stopped rendering at all. They are completely invisible, not even with invisibility particles. Any armour on the mobs is not shown either (or hitboxes), but they can still harm you. This issue can be fixed by unloading/reloading the chunks or relogging.

I have only experienced this with zombies and zombified piglins so far