I found 2 bugs related to this,
1: Skeletons are super fast, they chase the player at high speeds
I tried this on other mobs too. For zombies, spiders, creepers, and slimes it doesn't work. it's skeletons only
2: Creepers don't cause damage.
I guess because the slabs are waterlogged
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Thank you for your report!
However, this issue is Invalid.
Please put only one bug report in each ticket. It is very difficult to keep track of bugs when they are not in their own tickets, and it is easier for you to make multiple tickets than for the mods to separate them.
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MC-104900
MC-59425
Next time, one ticket per bug.