Audio issues on TPT MN channel

Hi

TPT MN channel, out of Minneapolis, started having audio issues yesterday.

Sounds like two audio channels coming in. Happens on a HD STB and SD DTAs.

Checked tvs Secondary Audio settings. Making any changes on these settings has no effect.

Contacted TPT but no feedback yet. 

So not sure if is a Comcast issue or TPT issue. All other channels good.

Wondering if anyone else in MN having this issue.