I've not heard anything to suggest that there was any fault in the voting system... if there was, then I'm quite sure that the elimination for the week would have been skipped whilst the system was rectified.
And channel politics... I've not heard anything about any producers or executives throwing their weight around either.
I'd simply assume that the elimination happened for the same reason as the previous eliminations - the team getting the least votes was eliminated.
There is some talk going on about some kind of ruckus after the elimination... but I'm not at all sure about the specifics 😳
God bless.