New Sequence from Clip causing Join Through Edit Issues

Issue

When using New Sequence from Clip with multiple audio files, Premiere appears to introduce one-frame source discontinuities at some edit points. These discontinuities prevent Premiere from recognizing the edits as through edits and therefore prevents Join Through Edits from working.

The same media and workflow do not exhibit the issue when the initial sequence is created manually.

Steps to Reproduce

1. Select multiple source audio files in the Project panel.

2. Choose New Sequence from Clip.

3. Organize/edit the audio files within the newly created sequence to be stacked vertically.

4. Copy the organized audio files into another sequence.

5. Place a cut point through all the files, attempt to use Join Through Edits

6. Some edits cannot be joined.

7. Inspect the source timecode on either side of an affected edit.

Observed Behavior

On affected edits, there is a one-frame discontinuity between the two clips.

Example:

• First clip out: 00:00:53:03

• Next clip in: 00:00:53:05

• Missing source frame: 00:00:53:04

Because the source references are no longer contiguous, Premiere does not recognize the edit as a through edit.

Extending the outgoing clip by one frame restores the missing source frame and immediately allows Join Through Edits to work.

The issue does not affect every audio file; approximately half of the tested audio files exhibited the problem.

Sequence Settings

The sequence created using New Sequence from Clip and the destination sequence that the stems are copied into have identical sequence settings, including frame rate.

Expected Behavior

Creating a sequence using New Sequence from Clip should preserve continuous source-frame relationships. Adjacent sections of the same source media should remain contiguous and should be recognized as through edits when copied into another sequence with matching sequence settings.

Comparison / Control Test

The same workflow was repeated without using New Sequence from Clip:

1. Manually create a new sequence.

2. Add the same source audio files to the sequence.

3. Organize/edit the files in the same manner.

4. Copy the files into the same destination sequence.

5. Place cut points and attempt to join the through edits.

In this workflow, all through edits are recognized and can be joined successfully.

The manually created sequence also uses the same sequence settings and frame rate as the destination sequence.

The key variable between the successful and unsuccessful tests is therefore the method used to create the initial sequence:

New Sequence from Clip → Some one-frame discontinuities occur

Manually create sequence + add same stems → Source continuity is maintained

Current Workaround

Manually create the sequence and add the stems rather than using New Sequence from Clip.

For an already affected edit, manually extending the outgoing clip by the missing source frame restores continuity and allows Join Through Edits to function.

Premiere Version: Version 26.5.1 (Build 1)

Operating System: MacOS Tahoe 26.6.2

Chip: Apple M4

Also, being able to hit a key command and vertically stack files would be SO SO SO helpful.