Dion Thompson
Assigned
No issues.
Reported
No issues.
Comments
Zombies are only supposed to attack players. It also seems like you're posting a lot of actual game features rather than bugs from other reports you did, so please make sure not to do that too often
I can also confirm this happens on 1.13.2 & 1.13.1. It also seems to be for flowing water blocks with a 4+ block length and affects mobs such as zombies, creepers and skeletons.
Lava Isn't meant to be able to be able to flow like water e.g over half slabs or stairs, it wasn't a feature in update aquatic like water was. I've even tried it for myself on the 1.13 versions and the exact same result appears.
If you want it to be a feature: asking on https://feedback.minecraft.net/hc/en-us would be the best place to do it.
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Does the glitch still occur after you restart the game? otherwise it could just be a one-off thing.
The problem, if it persists, could also be caused by the game lagging as you may have a lot of background processes, your computer doesn't have enough space etc.