Thanks for the logs, nothing relevant (except it takes 12 sec. for 18k songs, though full rescan will be much slower), no complains in the log. If you notice something disappears when it shouldn't, please share that particular folder/album (may be just a few songs from a folder + CUE if it's there) - I'll test it's related to the particular files/CUE. Also please note that Poweramp scanner (at least in "fast" modes, that are all rescan modes except the Full Rescan) is very date/time depende