Is it a issue?
Looks fine, that is required since it is a back-fed breaker that could pop out.
I would be more concerned about over amount of insulation not cut back in the panel and the sloppy work done.
I would be concerned with all of the cables entering in one connector or raceway in the top right corner.
What is the size of the branch conductors , on those 20 & 30 amp breakers ?