KRCW-TV transmits from Skyline, 18.4 miles to your south southwest, just like all the rest of your Portland stations. It doesn't transmit from Salem although its city of license is Salem. That just means their license requires them to provide a specific level of service to Salem, at a minimum.
It is not possible for your issue to be a reception problem as the individual sub-channels within a single station's channel are not individually distinguishable until the signal gets inside the tuner system and the individual data packets are decoded and assigned to their respective A/V streams.
Try doing a "double reset" on the TV with the issue or look for a "factory reset" in the setup menus (probably in a technician access menu). You might also check to see if there are any firmware updates available for the set.
https://apps.fcc.gov/edocs_public/at...C-291403A1.pdf