[2023] 1st set bonus bug with the ninja backpack?

I have a build I've been testing the ninja backpack with. It has a Belstone piece for the armor regen and armor on kill. There's no other regen on the build. I'm seeing an intermittent problem with the armor regen not working, It either works for the whole play session or it doesn't. So far, it mostly doesn't. I have no directives on.

I asked about this on reddit. Someone responded that there is a problem with 1st set bonuses and the ninja backpack. Can anyone confirm this and/or know if Ubisoft is aware?

It's sad that something many are looking forward to may have a bug that makes it almost ineffective. It may not be obvious to many that the 1st set bonuses don't work depending on what they are. A single piece with armor regen makes it easy to tell.

Thanks.