I have the following pinned items:
i.imgur.com/12cgWus.png

Up until today, any open instances of a pinned program would be grouped together starting from where the pin was placed on the taskbar

Now, the first instance opens on pinned item and any sequential instances are not pinned/sorted at all, as you can see here:

i.imgur.com/i4PPf7c.png

The 2nd firefox instance should be next to the first pinned one, which is how everything worked until very recently.

Did something change this in the latest version? If so, can I revert it to old behavior? Even if it means using an older binary?

Thanks

No, the firefox pin wasn't on the right. The example I gave you was minimal and bad, imagine 2-3 instances of all pinned items open + a lot of unpinned items open simultaneously for a realistic example. If you pin an item, all instances should open sequentially from that pin, making it impossible for them not to be grouped.

This isn't some functionality DisplayFunction added - it is default Windows behavior, that worked with DisplayFusion until recently, and is now broken. It still works as it should on the default Windows taskbar.

If you won't look into it can you tell me how to revert my version please? The entire reason I purchased DisplayFusion was for pins on my 2nd taskbar.

Cheers

It did work with DisplayFusion, I have used the feature with DisplayFusion for 8 hours a day since I purchased my license.

Maybe it 'just worked' with the way you guys did pins originally, and then a recent Windows update broke it? I don't know, but something definitely changed.

Unfortunately default Windows taskbar doesn't support pins at all, which is why I bought DisplayFusion.