Tower Health Bug?

Was doing some testing on defense and noticed something with Charon Tower

i test my base with Scylla invocation and it will one shot the Charon Tower but not the orthia or Poseidon towers. Charon has more health than both of these towers so why is it getting one hit ko’d?

at first I thought physical damage was a weakness to Charon but it’s not. Also orthia and Poseidon do not have a resistance to physical damage.

am I missing something or is it a bug?

 

Never mind lol

I was taking the Heath point from the upgrade screen and not the info tab. Blessings 

?

Lol