Erasing Receipient in Reports

I just realized that a report I have been running for month just erased one of the recipients. this is the 2nd time this happened to me. Any idea why this happens, or is there a way to tell when this happens?

What makes you think “the report” erased the recipient? How are you specifying the report recipients?

The report was sending an SMS message. I had my cell phone on there, and also a field [cell_phone]. Two days ago it stopped sending the message to the [cell_phone]. I finally realized that the [cell_phone] was no longer there. Just thought someone should know