Pretty much every Summa I have seen has that happen, mine included. Don't get me wrong, I love my Summa cutter, and wouldn't dare question the omniscient deities on high that would clearly have only designed this intentionally.
Ours is affixed in place with zip-ties, courtesy of the previous owner.
If it fails again, we will properly half-ass it and laser cut some plywood to make a fancy lever.