[Tahm W Bug] things are dying before he can spit them

I've seen this happen enough in my games now to be sure there is a bug:

If Tahm eats a low-health minion or monster with the intent of spitting it at targets, it will sometimes just spit out the gold value when you press W (meaning the minion dies with no effect and you get gold). I suspect the reason for this is some strange interaction with his new passive where the swallowed target is taking damage from his passive when it hits his stomach, killing it. However, even if that isn't the cause, many times now I've tried to spit a minion only to be met with "21g" pooping out of my mouth with no explosion or flying victim.