T-48G shows CID:,own number> in dialed list

[CloudConnect]

I have one customer with a lot of T48G phones who experiences an issue with the dialed list. For some reason certain outbound calls are showing up in the dialed list with CID:<own number> instead of the dialed number.
This seems to be cause by the fact that the dialed name is set to CID: <own number> while the dialed number is set correctly.
See the screen shot attached.
Customer is very unhappy with this behaviour.
I have not found a way to change this behaviour.
We have not found a relation to the number dialed, or the time of the day, or anything else that might explain why this happens.
Anybody seen this behaviour before? And if so, how was it solved?

Peter