Su-34 in Air Sim need help

Hi! I’ve been using Su-34 for bombing in air sim meanly for enemy airfields. I know now the AA in the enemy airfields will block your bombs but not sure how exactly it works? does it depend on the ammunition’s type (namely guided or unguided)? Or does it depend on the mass of the bomb?

Here is what I found: I sometimes could bomb successfully with incendiary bombs (but not always), but never successful with normal unguided bombs or guided bombs. Most of times it didn’t show any feedback message on the lower right corner to tell me if my bombs were blocked by AA or not. I used Y-6-6 for CCRP and drop all bombs on time, but it is just not hitting the target or there is some bug I don’t know.

Also, my su-34 seems to not be able to switch between my customized loadouts. It always shows the last loadout I picked no matter how many times I do J out and change my customized loadout. It will only come back to be working if I switch to one of its default loadouts.

Any ideas?