I am not sure how the sharing function works so maybe you can help me out here. When I send you the link to the project, do you get a specific version of the model or just the latest. I am suspecting that you are getting just the latest. Because, I needed to move on with my project I did promote a version of the project from before I created the "linked" files, the current version of the project therefore would look as you describe. Do you have a way of accessing older versions? You can probably recreate the problem from the current version if you want, while doing this you can also observe the other problem I have reported regarding saving a component which does not appear to be fully captured upon save. To observe the "not saved" problem attempt to save the "corner" component. When done compare the contents from before and after and you will see stuff missing. In order to recreate the problem on disappearing, do a save on the component "Right End", when saved and verified by opening the new file that the full contents have crossed over, then remove the "Right End" component from the original and do an "Insert into current design" using the saved "Right End". Then attempt to unlock the newly inserted "Right End" component.
If this does not work for you I will go back and get the version that is bad, export it, create a new project, import it and then send you the link to the new project, the problem should be the same.
I will attach the video for both the Save Component and the Delete upon unlock problems.
Please let me know if you need more as I would like to understand if this is a bug. BTW, I do understand that my model is large, some have told me larger than is suitable for Fusion however, I am 3 years into a Fusion learning curve and don't want to start again with Inventor which may have similar problems.
Thanks for your time looking at this.
PS Looks like I can only attach one video, I will send a second post with the second video.