What does this backup progress bar represent?
Thank you for your feedback!
Like was previously mentioned in this thread, the progress bar is algorithmic and its progress value is in fact a composite estimation of the overall backup procedure, including such stages of it as searching for the data locally modified since the previous run, compression, encryption, upload, and purge.
Thus, in some setups, the progress bar could be less precise than in the others. Our R&D is aware of the most common issues, including similar to the ones you have mentioned. We aim to adjust the algorithm in use and improve the reliability of the progress bar going forward.