None of my VIP receivers have ever done this....
for some unknown reason the receivers (all of them AFAIK) just stop showing the banner.
For a description of what Enhancement does, click on the "help" button on the Enhancement Enable/Disable window. (Essentially enables an interactive icon to be operable when Dish inserts a possible action item.) It should have absolutely nothing to do with Caller ID, but if that solved the issue all's good....
I'm not even sure what Enhancements are since I don't see anything different except that Caller ID is now working.