P: GIF opens with incorrect number layers

I have a GIF I'm using for an animation. It has 375 frames/layers.


I'm having trouble uploading it here (Bad Gateway) but the referenced Adobe Forums post at the bottom has the GIF attachment. (in the uploaded example all layers are white).

When I open it in PS 19.1.6 I see all 375. Another user also tried it in CS6 & CC 2014 with the same result.


When I open it in PS 20.0.0 I see only 119 layers/frames. The other user was able to reproduce this.


See original adobe forums post for reference: https://forums.adobe.com/message/10701225#10701225