@Saydon Hooray a new firmware release has been issued... good luck to everyone, hope this resolves our issues https://www.tp-link.com/en/support/download/archer-vr400/#Firmware

Same here, late evening or overnight it disconnects, I don't see it rebooting in the logs. I saw a suggestion elsewhere that V3 hardware (eg C1200) got this update on 13.05.2020: "Improved connection...

@Lighten I requested the same a couple of weeks ago from TPLink Support, my router reboots overnight every night without cause. No diagnostic logs, and it's not hot.