Same Problem with BTCINO 344704 we did try with two openers.
One Opener is with 1.5.1 Firmware and the second Opener is with the Firmware 1.4.6.
Configurations works with both and also the open with App works.
Mostly works Ring to Open for the first few days and then stops the working Ring to Open.
Wiring is correct I did also try the minimal installation with BUS+ & BUS-.
Support is informed and they did modify some values of the Firmware 1.5.1 and then it did works a bit better but at least did the Opener again stop with a working Ring to Open.
My Opener did works 9 Months without problems and very precise and after the Update to Firmware 1.4.4 was the problem coming in.
Also when Ring to Open works the protocol doesn’t shows unknown rings…
Personal I think it’s a value problem because when the Bus system is closed and connected to my intercom with the first ring then it shows also other rings. (first ring and Bus connect) nothing is shown but a second ring as long the Bus system is closed (between 60sec) is shown.
With a lot of luck does also the second Ring activate ring to open.
Is there a way to modify the Firmware value like the support?