MacBook Pro (13-inch, M1, 2020)
Apple M1
16 GB

Premiere version:15.4.1

When I encode the video, I get some flickers especially with gif animations.
The problem is improved by version down to 15.2, but it takes too long to encode then.
The encoding time in 15.4.1 is approximately 10min for the video whose duration is 30min but in 15.2, it takes more than 1.5 hours...
The video duration is the same.

If it takes that long for every single video, I cannot finish my work and my client also get angry.
Please fix the problem.

Thank you.