Hi,
I have the Opener attached to a HTS 711-01 intercom. Everything seems to work as expected, ring to open, opening via app etc.
But I have a strange issue that is difficult to reproduce: On some days it doesn’t work meaning when I open via app it says “opening…” and then “open” but I don’t hear the buzzer. I then try it again but it still doesn’t work no matter how often I try further. The only thing to make it working again is to ring the bell once! Then I can open via app again. So somehow ringing the bell “unblocks” something. 
Another observation I made: In case the opener doesn’t work, it also doesn’t work anymore to use the opener button on the intercom. After ringing the bell, it works again too. 
It’s hard to reproduce. Let’s say if it is working, then I can try to open it 3 or 4 times (in the hope to reproduce that error) but it always opens it and I can hear the buzzer. So I’m running out of ideas what condition lead to this strange behavior.
Did you experience something similar?
Do you have any ideas what else I could try to at least reproduce it?
Does it more sound like an issue with the software or the hardware?