Hadn't though about this for years. After the SEC/PAC12 discussion, I did some experiments & the problem (in my case) seemed to be caused if I had *any* of the sports "multi-channels" (where you get a + sign on the guide channel that expands to a number of sub-channels) included in my main favorites list. However, my handful of SiriusXM channels (with the + sign) in the favorites caused no problem.
Sorry I don't have anything specific to help you.
Sorry I don't have anything specific to help you.