2d Animation bones dissapearing (Help)

Hello Unity experts, I was wondering if anyone can help me solve my problem with unity's 2d sprite bones. I have a character that I have separated in PS to several layers and rigged accordingly. The rig works perfectly but after closing unity and relaunching the editor my bones dissapear from my in game character. As you can see from the images I have rigged and applied the bones to the character, theyll work for a bit but then as I said they just dissapear and I get the second image error on each of the layers "Sprite has no Bind Poses". Clicking create bones does nothing at all and its leaving me clueless. I tried looking over google to find similar problems but can't see much, I found a but report on it but it was marked as fixed.

Im using unity 2019.3.0a7, have also tried unity 2019.2.3f1 same problem.
Also 2d Animation preview v2.2.0

I understand these issues are bound to happen in previews but just wondering if anyone has a solution, thanks.