Hello @Norbirad,
switching to English for other potential readers.
Concerning the behaviour you’ve reported we have released a FW update (1.10.1)
back in the beginning of this year to address the rare cases where low battery charge could lead to
malfunctioning of the intercom.
This update should prevent such scenarios and in addition will reject lock actions
when reaching a critical (<4V) state.
This behaviour was already mentioned in the Beta version explained here: Nuki Opener firmware - beta release notes
So, please make sure to update to the latest FW version.
(On a side note: Please bear in mind that upon a previous request by TCS TürControlSysteme AG
we have discontinued our official support for TCS intercoms for the Nuki Opener. Existing Nuki Opener setups can still be used. Linked here: Why is TCS not on the Compatibility-List for the Opener!? - #5 by MatthiasK)
Have a nice day!