We have 5 ME-1 units individually connected to an ME-U hub (connected to an SQ8 board) using POE power. Quite regularly all the ME-1s will lose the Bass channel and have to have it reassigned. All ME-1s have the latest firmware (1.17). The system was installed in mid 2019. I haven’t confirmed what firmware version is installed in the ME-U (the latest 1.10) was released in 5/2019.
In searching the forum I see that user tylermartin86 posted the same issue. No resolution could be found in the thread.