Defenses gone when making a copy of a character.

When I make a copy of my character, the defenses I had added on the original are gone on the copy.
I made another copy: same problem, so clearly another bug.

 Edit typo

Using Customize, I had added both fire and poison resistance to the character sheet to the DEFENSES.
For source, I filled in the name of a 3rd party book. 
Preparing for the next level, at My Characters, I made a Copy.
This copy does not show the customized defenses.
To make sure it wasn´t an issue for this character only, I then repeated this with another character and got the same results.

I used the same procedure for SENSES. Those settings are copied without flaw.

Update: new character; problem not resolved. Custom Defenses gone.

Confirmed, copied sheets don't retain custom defenses.

This used to be the case with weapon mastery selections, back when they were first added to the character builder in 2024. The underlying issue is likely that the character-copying code is going through a hard-coded list of various kinds of things that need to be copied, and if something isn't on that list, it doesn't get copied.