Brian at Cox Help emailed me that he submitted a ticket to the back office team this afternoon.
Tonight I did a test on an outgoing call and it appeared on the call history in 15 minutes. I did the test because the previous outgoing call appeared in less than 90 minutes but it was probably faster than that because after the call I ate dinner and didn't run the call history during that time.
Incoming calls are still taking several hours. Of four that have not yet appeared on the call history, one call was 28 hours ago, another 12 hours ago, and 2 were 3 hours ago.
I also sent an email about the problem we had in August of 2022 when my call history stopped working, giving a message "We are currently experiencing technical difficulties...." then "Error while fetching call records." It took 4 months to get it fixed (8/15-12/8/2022). It failed shortly after fixing a buffering problem. It was down for so long I lost a few calls that were older than 120 days (I hadn't downloaded the call history for several days prior to the failure). Perhaps whatever caused that may be causing the current problem, corrupted records or something.