Some redstone components wont de-power properly even in non quasi connectivity configurations. This is easy to replicate with pistons though Ive seen some tripwire hooks get into a kind of locked powered state but couldn't replicate.
To replicate the pistons place ~10 pistons facing horizontally separated by a block gap between each, a line of blocks running over the top of them and dust over that. Place a redstone source over a piston (important for some reason) then de-power it. Some pistons (not all) will remain extended.
Environment
Windows 10 64bit running vanilla Minecraft 20w15a with the vanilla tweaks resource pack to display the redstone signal strength and connections better
Also happens in snapshot 20w18a