Edit:
This question has been resolved.
This is not a Bug.
Thanks to everyone who gave me the information.
Hi,ppl 
Currently, it’s known that damage converted to physical from other types ignores armor.
This is strange because this is the only thing that behaves out of system about armor.
Is this the behavior as intended by the dev team?
Or is it a bug (= not intended)?
I have searched within the forum,but I can’t find any official information about this.
If anyone knows about this, I would be happy to let me know.
(Responses from the dev team in the past, etc.)
Thank you for your help!