At this point I'm assuming it won't be fixed unless there is a complete infrastructure overhaul to the app and workspaces. That said I have dealt with this issue since, 2017 or 2018 build I want to say (it's been around forever) and I think I have a pretty good sense of how and why this happens. Allow me to divulge the obsurd level of nerd-ity I have learned about this issue, and unfortunately it is two-fold. ISSUE 1: When you first get Premiere, it comes with certain default workspaces (Editing, Color, Audio, etc.). These workspaces Premiere seems to hold near and dear to its heart (at least as of 2017 onward when this issue started happening). Every time Premiere boots up, it checks to see if these workspace names exist. If it can't find but one, then it goes into panic mode and does a few things: Return all default workspaces Return the workspace toolbar back to its default state Moves any workspaces that don't belong in the toolbar by default, into the Overflow menu. And yes, this is obviously all quite annoying. That said, if this is the specific issue you are experincing, the resolution here is to never delete or rename default workspaces. It's ok to modify them, it's ok to put them in overflow/hidden. However if you delete or rename a default workspaces so it doesn't exist anymore, this reset will happen. ISSUE 2: I'm not sure if this is because Adobe tracks workspace panels by panel name, but panels such as the Project and Timeline panels can be subject to being popped out. It's possible that a workspace is looking for a panel like "Project- MyGreatProject" and then when you open a new project, the panel name is different because the project name is different, maybe that's what's throwing it off. Unfortunately i haven't found a way around this yet, and usually I have to drag the panel into the location and save the changes, and repeat on a per project basis. You might be able to enable importing workspaces from projects: Window > Workspace > Import Workspace From Projects. to avoid this, but personally I really don't like this feature as I like having my workspaces consistent across projects, so I leave that disabled and tend to "deal" with the issue per above. But yeah, it's a bummer. I used to check these forums every update to see if it would be fixed and at this rate I've given up, unless like I said Adobe completely re-works the app with a new UI and infrastructure (which Premiere might be due for a little bit). Maybe one silver lining is Adobe acknowledged Issue 2 in their Known Issues list for 2020, but personally their suggested workaround of resetting to saved has never worked for me, at least not in 2019 (haven't done a whole lot of work in 2020 yet)
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