Minecraft 1.16.4
Forge 35.1.36
Create mc.1.16.3_v0.3e

Was building elevators and updated to 0.3e (was on 0.3b before) where I discovered that my elevators suddenly lost the frequency on the link for the analog lever signal.

It seems that any link powered by a lever or analog lever that is moved by a pulley loses its frequency as soon as the pulley stops and the blocks are placed.

Video: https://youtu.be/nLlNXe--iV4

Apparently the issue does not occur when the lever is placed on the top face of the block.

Correction to previous comment: That does not consistently prevent it from happening.