Error "Fehler beim senden des Befehls"

I am using the Unfolded Circle Remote 3 + Dock 3.

It is really a pity, but it happens from time to time that commands aren’t send correctly:

I have trained IR-commands and from time to time I get an error, when triggering an IR command on my remote:

I really wonder, why my AVR Receiver shall respond. The IR communication is one-way only.
It is not related to any specific button/command. It can happen already in the turn-on sequence or when just sending a single command.
I noticed that this is reproducible, when hitting a specific button several times in a short time-period. But still wondering why? IR is one-way only and my Receiver will never send anything back.

This isn’t only happening when using my AVR, but other IR devices as well.

How can I prevent this?

I am pretty sure that you use a Dock to send IR commands and the communication between Remote and Dock is not stable. You can use the remote itself to send IR but then you have to point at the device.

Ralf