Source sequence timeline playheads ganged when OFF, and ganging breaks when moving Program playhead

Environment

• macOS Tahoe 26.5.2 | M1 Max MacBook Pro (64 GB RAM)

• Premiere Pro 26.3.0 (Build 93)

• No available updates in Creative Cloud at time of testing

Workflow / context

I’m using the Source Sequence in Source Monitor / Open Sequence in Timeline / pancake timelines workflow:

• Load a sequence into the Source Monitor.

• Use Open Sequence in Timeline to open that source sequence in its own timeline above my working Program sequence.

• Now I have:

  • Source sequence visible in the Source Monitor and its source timeline.

  • Program sequence visible in the Program Monitor and its program timeline.

I’ve recorded a short video demonstrating the behavior here:
https://f.io/9T-wih53 

Issue 1 – Source timeline playheads ganged even when Gang is OFF

Steps to reproduce

1. Load a sequence into the Source Monitor.

2. From the Source Monitor, Open Sequence in Timeline 

3. Ensure Gang Source and Program is OFF 

4. Scrub the playhead in:

   • Source Monitor → playheads behave independently (as expected).

   • Program Monitor → playheads behave independently (as expected).

   • Program timeline → playheads behave independently (as expected).

5. Now scrub the playhead in the source sequence timeline 

Expected behavior

With Gang Source and Program OFF:

• Moving any playhead (Source Monitor, Program Monitor, program timeline, source timeline) should not gang/lock playheads together.

• Source and program sequences should behave independently regardless of where I move the playhead.

Actual behavior

• When I scrub the source timeline playhead, the program playhead moves with it, as if Gang Source and Program were ON.

• The Gang Source and Program button is OFF, but the source timeline playhead behaves as though ganging is enabled.

• Scrubbing in monitors or the program timeline respects the OFF state; scrubbing in the source timeline does not.

So the ganging logic appears to be incorrectly applied to the source timeline even when the gang button is off.

Issue 2 – With Gang ON, Program timeline movement turns ganging off

When I try to use Gang Source and Program intentionally, there’s another issue.

Steps to reproduce

1. Same setup: source sequence loaded into Source Monitor and opened in a source timeline above the program timeline.

2. Turn Gang Source and Program ON 

3. Move the playhead in the Source Monitor.

   • Source and program playheads move together (ganging works as expected).

4. Move the playhead in the Program Monitor.

   • Playheads do not move together; ganging appears to be ignored.

5. Grab and move the playhead in the Program timeline.

Expected behavior

With Gang Source and Program ON:

• Moving the playhead in either monitor (Source or Program) or either timeline (source or program) should keep playheads ganged

• Moving the program timeline playhead should not toggle the gang button off by itself.

Actual behavior

• Moving the Source Monitor playhead correctly moves both playheads.

• Moving the Program Monitor playhead does not move the Source playhead; they behave as if ganging is off.

• Moving the Program timeline playhead appears to turn ganging off: after this, the playheads are no longer ganged.

So with ganging enabled:

• Source Monitor → ganged behavior

• Program Monitor → not ganged

• Program timeline → movement seems to “break” or disable ganging

This makes the feature unreliable for real-world use.

Notes

• This is 100% reproducible for me with sequences loaded as source sequences and opened in a source timeline.

• I’m not seeing any current known‑issues notes about this in the 26.3 “What’s New” or known/fixed issues documentation.