The web UI is reporting an uptime of 1h17m for a machine that I only rebooted 20 minutes ago. I think this must be a timezone issue as I’m in the UK which is current using BST, which is UTC+1.
The machine is a Raspberry Pi 4B with Syncthing 1.18.0 installed from your apt repository and started by systemd at boot. The process has no TZ environment variable set and the contents of /etc/timezone is “Europe/London”.