I personally think this is not normal. Could you test whether the issue still exists when all audio files are removed from the database in the same project?
Additionally, what is the total file size of these audio files? And how many audio data entries are registered in the database?
If it can indeed be proven to be related to the quantity or size, this will help in creating a test project that can reliably reproduce this issue.
After experimental testing in version 1.0.20, if audio is imported in bulk, there is indeed a stuttering issue. I believe this is a bug and have submitted the corresponding report.