No names (only numbers) in recent calls log on Andorid 7.0 watch

Is it my watch or it is a common problem?
My watch is AllCall W2 and I have this problem for 2 years now.
I have tried different FW version, no success.

Do you have multiple contacts with same number ?
I have seen on phones, that in this case it doesn’t know which of the names to display and instead display the number…

All the entries are numbers. I have cleared the list several times, didn’t help.