Just wanted to add that I've noticed this always happens on row 0 of the x chunks: the effect can be reproduced constantly if found build a z row for every row 0 of any x chunk.
I haven't found anything significant regarding z repeptetivity yet though.
Furthermore, I've found behaviour of the activation can be diffent if coming from the side (as demonstrated in the video and images provided bu the reporter) and from the top (using block with a lever on top, activating the redstone) ie: sometimes they act the same, sometimes the switch on top works, but not the side one; sometimes the side works, but the top doesn't! The "effect" remains constant depending on your z location (respecting the x chunk rule mentioned above).
I attached a save that triggers this bug, to trigger it, simply teleport using:
/tp -742 6 -185
Note that this world has a custom NBT that spawns a custom FallingSand, that, if it doesn't exist, gets pushed by a piston (generating a wood bridge in this case).