Syncthing shows “Syncing (43%, 3.80 GiB)” for one of my devices (which is the send only for a few of my folders). All of the folders are “Up to Date”. No network transfer or anything else happening, it just says syncing forever (if one of the folders change, it syncs correctly).
I have ignored stuff in the folders, so that might cause some problem.
Is it a known issue?
Currently, every ignored file / folder will cause out of sync. So this is expected, if you ignored 3,8GiB worth of files. If not, you may have shared a folder from device A to device B, but not from B to A.