Hit box question during attacks

PG’s description of hunters says you can strategically target towers but often times my
Spell shot bounces to something else and unless I’m right on top of the cluster I cannot hit the back towers unless I take out the front ones first.
I’ve noticed for a while now that some monuments won’t target with my sorcerers.
I usually skip the kill shot because of how on top of it you need to be before the shot works.
I know healing mark has bounced to untargeted monuments for some time but not being able to take out the back towers at a reasonable distance before the front ones are gone feels new and not strategic.
Is this a bug or intended?

It’s a bug that has been ignored for a long time.