Premiere does not correctly see the alpha channel

I export from After Effect a file with an alpha channel (Proges 4444, PNG, and others), after importing into Premier, i see stripes instead of a smooth transition. (((

How it looks in After Effect

How it looks in Premiere

The edges of the alpha channel do not blur smoothly, I could fix this only by turning on layer blending "Ligten"

I tried to count 8 and 10 bits, with different color depths,straight(Unmatted) and Premultiplied(Matted), nothing helps, in previous versions there was no such problem 

I use MacOs, Premiere 14.5.0(Build 51), After Effect 17.5.1(Build 47)

I attach the files that I am trying to connect