Just been notified that Update 3 is available, at least in UK. Doesn't look like there's anything urgent I need to fix.
Does anyone want to test it so I don't have to risk a late night
(2019-09-24)
Fixed Issues
Does anyone want to test it so I don't have to risk a late night

(2019-09-24)
Fixed Issues
- Fixed the issue where SRM might fail to save the IP addresses of gateways and DNS servers after the reboot of Synology Router.
- Fixed the issue where PPPoE Relay might fail to work normally after the reboot of Synology Router.
- Fixed the issue where SRM might display the item "40MHz only" in the 5GHz band.
- Fixed the issue where IPv6 on LAN might fail to be disabled when the interface of WAN is set up by Auto WAN.
- Fixed the issue where SRM cannot display Channels 120-128 of the 5GHz band in Japan.
- Fixed the issue where Wi-Fi might be forced to restart when password rotation is enabled but the guest network is disabled.
- Fixed an issue where SRM might fail to renew the Let's Encrypt certificate after the reboot of Synology Router.