Morozov/Naryzhnyy? (Happened after Zhuk/Svinin started working with Morozov the dad)Only one such partnership comes to my mind - Tyutyunina/Bagin. And it didn't end well.
Khavronina/Naryzhnyy? (Gorshkov et al now collaborate with Zhuk/Svinin)
To put it diplomatically, I have a feeling Z/S play a more active role than other coaches in deciding who skates with whom.
Also sometimes the partners say they had split up already before a new partnership starts, but the timing of this news release seems rather coincidentally close to the better partner becoming available (just like P/N now).