Upon closer CLOSER testing, it seems that not only do the Bradley cannon explosions damage bots but the entire shell itself is completely ignored by the bots.
No settings have been changed as far as I know to facilitate this behaviour.
The only loaded plugins at the time were:
Vanish
BotRespawn
Kits
Welcomer
Admin Radar
So in other words I've only loaded the bare minimum plugins possible with vanilla settings to confirm this behaviour is abnormal