If ripple mode and ripple all tracks are enabled, dragging two clips at the same time sometimes doesn't work

Often I want to move around two or more clips across tracks at the same time.
But cross-track alignment breaks if they are moved in a particular way.
This is the most barebone actions necessary to reproduce this bug.

Steps to reproduce:

  1. Arrange clips so that there is one clip on V1 and one clip on V2, as shown in the image above.
  2. Enable both ripple mode and ripple all tracks.
  3. Click on clip A and drag it twice rightward.
  4. Click on clip B and drag it leftward to where it was originally.
    If clip A is dragged, this bug doesn’t occur.
    If clip B is only dragged somewhere midway between 00:00:00:00 and where it is, this bug doesn’t occur.

Tested with v21.06.29.
Tested on Windows.

Thanks for the detailed report. I reproduced this and it is fixed for the next release.

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