if you do a manual hand import which results in importing hands from like 44991 files and for example you are at 6748 out of 44991 files ... and then pause the import and then resume it the import starts at file number 1 ... so it does not continue where if got paused but starts from the beginning going through all the files again
so for the first like 6748 files it does nothing but check each hand in those files and probably report them as a duplicate found so the real import when resumed takes up a lot of time to actally really import hands
THIS IS VERY ANNOYING