These channels use the same SID (Service Identification Descriptor) and they are on adjacent frequencies. This is not an issue with commercial receivers that are designed to tune a single transponder. On consumer receivers the combination of the AFT (Automatic Fine Tuning) and the automatic service updating features are a problematic mix.
Not sure why this problem is happening again, but there is a quick fix. If you want to receive these channels without interruption and break-up, edit each of the channels SID to be an unused value. Example: change the SIDs to 2, 3, 4. Now the receiver will not find another identical SID on an adjacent transponder frequency. Most receivers will not allow the user to change the SID in the install menu, but the SID can be changed on the channel list with a computer.