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i Had a similar issue with vvx 410 phones. Once upgraded to 4.1.6 software, the issue went away. Hope this helps.
The item below was fixed in release Polycom software release 4.0.4 for the Soundpoint IP phones. If a call was received without a caller-id name the call would not be logged in the missed/received call lists. I would recommend upgrading to release 4.0.5 as that release also has some additional fixes for using the phones with the NV7100. The 4.0.5 release is not yet available on the ADTRAN website but can be downloaded directly from Polycom.
76769/82121 Calls without SIP DISPLAY INFO are now logged under the missed/received call lists.
If the upgrade does not resolve this issue, then I would recommend opening a ticket with ADTRAN support for further troubleshooting.
Thanks Charles, I updated the phones to 4.0.5 and that did the trick!