I have an s3 bucket that I'm syncing my media files to. There are also some other folders that I've synced in with rclone. When listing the entire bucket contents with rclone, I can time the operation to 40 seconds on my linux computer, by running something like "time rclone ls mybucket:". The resulting text file is approximately 7.5MB.
When I try to view the content from s3drive, I get a notification almost every time that the listing is outdated, and I'm prompted to refresh the file list. If I agree and try to update this, the listing still isn't ready after 30 minutes. I've tried timing this on several occasions, but it turns out I don't have the time to sit and stare at my phone for an hour to get an accurate timing.
I believe I've reported something similar before, probably more than a year ago. I've had this issue from day one. I keep my app up to date.