When exporting png sequences, random frames disappear. Adobe Animate

[Маргарита33656228ounk]

When exporting png sequences, random frames disappear. Also, when an archive with a sequence is transmitted, after opening, random frames disappear. The programs were updated, the ssd disk was replaced. 

[kglad]

how many frames are in the animation?

[Маргарита33656228ounk]

Always a different amount. The problem is not with one sequence. 

[kglad]

if all were exported, how many?

[Маргарита33656228ounk]

in the latest version, 309 frames were exported, but only 287 were exported. this is an example. there is always a different number of frames, because different shots

[kglad]

do you have a sound in your fla that's set to stream?