Spiders spawning on pressure plates

Bug

Spiders are able to spawn on Pressure Plates, while they cannot do that on Java Edition

Steps to reproduce

1. Create a spawning platform and a platform above that to make it dark enough for mobs to spawn (or uses /time set midnight to make it dark)
2. Place multiple rows of pressure plates
3. (Make sure mobs can spawn (/difficulty easy or higher and /gamerule domobspawning)
4. Watch the mobs spawn

Or do this (works in 1.20.80 or later):

1. Open Spider on Pressure Plates.mcworld
2. Wait a minute for the command block to kill the mobs
3. Watch the mobs spawn

Expected Results

Spiders are not able to spawn due to the Pressure Plates

Observed Results

Spiders are able to spawn

Notes

Due to MCPE-180822, I am unable to add a world download for 1.21.0.22 Preview

See image below for the platform, the layout of the pressure plates and the observed results