Strange. Did you lock your sidebar preferences? Not sure it should matter but try that. It’s been pretty stable for me but I do find that if I accidentally drag a folder out it does disappear (locking only saves the settings like fonts etc).
I read this topic because with Pathfinder 8, I have totally lost the ability to drag folders into the side bar that I use most often. This really sucks. I totally hate version 8 because of that. To me, a bunch of mostly useless capability was added at the expense of what worked best.
These are not the favorites we're talking about. There are favorites from the macOS Finder (a folder in the user's library folder with links to other folders) that could have been displayed in the sidebar – but now in PF 8 it's gone. In PathFinder 7 you could create such a link with Shift + Command + T (hope I remember that right).
Having lost my favorites and rebuilding them three times I'm fairly annoyed as well. If you can't get Pathfinder to sync with Finder's favorites, why not at least provide a separate list of favorite folders private to Pathfinder? This is a key feature and to just drop it without saying anything is not appreciated. Is everyone just supposed to discover this on their own, dragging folders into the Favorites area and then discovering them missing eventually? If the feature is disabled, WHY do you allow folders to be dragged to the Favorites region and keep them there for a while??? Really bad communication with your users.
(Now I'm wondering what other "trick" disabled features are in PF8 )
Is this what used to be called Places? I have about 20 folders in that list in PF7 and none of them are showing in PF8. Actually now that I look, I see both Places and Favorites in PF7, but there is no Favorites actually showing up in my PF7 sidebar. And no option called Places in PF8. So basically that list is gone in PF8.
Nor are the various saved sidebar configurations I had in PF7 available (ported over) in PF8.
Uninstalling now, and hope I never have to upgrade until these issues are resolved. And I won't even be able to try again because my 30-day trial will have run out by the time I feel like checking to see what's been fixed.
Not singling out Cocoatech, because this is all too common, but how does stuff like this make it out the door? The features that make the product one of the main reasons not to use Finder, and either it doesn't work or it doesn't bring over your hard-earned customizations from the previous version when you upgrade?
I work in the SW industry and this is why I sometimes hate it. The disdain for the users is just infuriating.
Not really relevant to this thread, and I will report separately, but after I went back to PF7, no files were visible when I chose View as List (which is my default). View as icon or column worked fine, but not view as list. So PF7 was literally useless to me.
Thanking my lucky stars that I had a time machine backup and could restore my Application Support/Pathfinder folder, which got things working again.
This is another "gotcha" with PF8 that messes with my established workflow from PF7. I honestly hate to pile on the developer, but in hindsight, I am wishing that I stayed with Pathfinder 7. Version 8 doesn't appear to add much value to my workflow while removing other features that I relied on.
I also own a license for the latest version of Forklift, when I tried it for a while. It was pretty good, but I preferred PF7. But now...樂
EDIT: I decided to remove PF8 for the time being and give Forklift another go. I may revisit things in a few months.