When triggered by comparators Observer gives longer pulse

When an observer block reads a block update caused by a comparator output, the signal emitted is longer than a single tick pulse

Attached to the issue report is a zip file (Longer pulse Observer bug.zip) with a world download to simulate it.
Notice how every other kind of block update emits a single pulse (allowing the piston to break and translocate the shulker box) while comparators ones emit a slightly longer pulse that doesn't allow translocation