Syncing stuck at 100%

Two Windows devices A and B. They sync 4 folders. On A, everything shows “Up to Date” for both the folder list on the left side, and the devices list on the right.

On B, the folder list is "Up to Date"x4, but device A, on the right, is stuck at "Syncing (100%). There is no fix to either refresh or restart. Both devices are using the current version of ST.

There are no files out of sync in any folder.

I noticed several similar threads to this one here on the forum, but no solution that appears relevant to mine.

Advice, please.

Do you have any ignores/excludes?

Nope.

Any out of sync files? Any log messages?

Nothing OOS. This is the most current text in the log file for the device that is stuck:

[35ZN3] 15:49:21 INFO: UPnP parse: unrecognized UPnP device of type upnp:rootdevice [35ZN3] 15:49:21 INFO: UPnP parse: unrecognized UPnP device of type upnp:rootdevice [35ZN3] 15:49:21 INFO: UPnP parse: unrecognized UPnP device of type uuid:00000000-0000-1000-0000-e8de2730ecd0 [35ZN3] 15:49:21 INFO: UPnP parse: unrecognized UPnP device of type uuid:00000000-0000-1000-0000-e8de2730ecd0 [35ZN3] 15:49:21 INFO: UPnP parse: unrecognized UPnP device of type urn:schemas-wifialliance-org:device:WFADevice:1 [35ZN3] 15:49:21 INFO: UPnP parse: unrecognized UPnP device of type urn:schemas-wifialliance-org:device:WFADevice:1 [35ZN3] 15:49:21 INFO: UPnP parse: unrecognized UPnP device of type urn:schemas-wifialliance-org:service:WFAWLANConfig:1 [35ZN3] 15:49:21 INFO: UPnP parse: unrecognized UPnP device of type urn:schemas-wifialliance-org:service:WFAWLANConfig:1 [35ZN3] 15:49:22 INFO: UPnP parse: unrecognized UPnP device of type upnp:rootdevice [35ZN3] 15:49:22 INFO: UPnP parse: unrecognized UPnP device of type upnp:rootdevice [35ZN3] 15:49:22 INFO: UPnP parse: unrecognized UPnP device of type uuid:00000000-0000-1000-0000-e8de2730ecce [35ZN3] 15:49:22 INFO: UPnP parse: unrecognized UPnP device of type uuid:00000000-0000-1000-0000-e8de2730ecce [35ZN3] 15:49:22 INFO: UPnP parse: unrecognized UPnP device of type urn:schemas-wifialliance-org:device:WFADevice:1 [35ZN3] 15:49:22 INFO: UPnP parse: unrecognized UPnP device of type urn:schemas-wifialliance-org:device:WFADevice:1 [35ZN3] 15:49:22 INFO: UPnP parse: unrecognized UPnP device of type urn:schemas-wifialliance-org:service:WFAWLANConfig:1 [35ZN3] 15:49:22 INFO: UPnP parse: unrecognized UPnP device of type urn:schemas-wifialliance-org:service:WFAWLANConfig:1 [35ZN3] 15:49:25 INFO: New UPnP port mapping: external port 6412 to local port 22000.

Would device A being Master for 3 of the 4 synced folders have any bearing on this?

Never mind, I figured it out. It involved a sync conflict that I only discovered by looking in the folders themselves and finding it in one of them.

Would have been nice if ST had pointed that out in the browser interface somewhere somehow.

Good idea! You can submit a feature request at https://github.com/syncthing/syncthing/issues/ if you want