When using synchronize clips to synchronize audio, it is expected that the clip that appears earlier in the timeline is going to move backwards to meet the clip that appears later in the timeline. The clip later in the timeline is not moving at all.
However, in this instance, when using synchronize clips, the clip that appears later in the timeline has audio crossfades on both ends of it that are being removed after the synchronization completes.
Premiere 24.5
OSX 13.6.7
Video showing the problem below: