Upgraded to 4.7.18 Beta 3

New gallery albums appear at end of list (when using default Sort By > Recently Updated).  They previously appeared at beginning.  

Gallery thumbnails are not being generated.  

I dont seem to be able to replicate the issue with thumbnails. I suspect it may have been related to your other problem there

Yeah, I just fixed the album creation bug and wasn't able to reproduce the other issues once the initial bug was fixed.