I would cease it. Even very good pest controllers often spray shrubs which bees visit. It looks like you are in Oz, and I don't know if boric acid is available to you. If so, it is a very good roach killer.
The other option is closed traps - roaches go in and eat the bait, then take it back to the nest. The nest gets wiped out from the bait. The traps are not attractive to bees and the poison is relatively contained. Still not optimal, but I have a significant roach allergy (proven by medical testing), so this is what I do.