Redstone wire does not update enough blocks

I remember it couldn't be activated through the glass

in java edition, it could. that is called to qc activate. you can try it yourself.

If you flip the lever and then put a block beside the piston, the piston would extend. Conversely. if you switch the lever off with the piston extended, it wouldn't retract until you put another block beside it.

I believe the report should be confirmed as a bug.