Choose a local programme that differs between the two regions. Confirm the region actually playing on the TV through an on-air identification or the content itself. Compare the broadcaster’s published schedule for that edition with the guide row. Write down both names before changing any settings. A shared national programme earlier in the day is a weak test.
If the device time is right and other channels are normal, check the affected row’s channel identifier. Some players allow a manual source choice. Record the old value, change only that channel and see whether the mapping survives the next refresh.
Post the region, local programme and exact times with the player version. If you can confirm the corrected mapping after an overnight import, add that to the thread so the next viewer knows which change held.