On the system timer menu you can select Model or Total

In the model mode it does keep track of total model time which I like.

I just noticed that when in Total systen time mode it Auto resets when the Transmitter is turned off and back on. Prior to the soft ware update I think it was keeping track of total System time unless reset manually.

Also just noticed that if in Model mode the System timer does not even start unless switiched to Total.

My 12z keeps track of total System time unless reset.
I have always keep track or total time between charging of the battery Then reset.

As I said before do believe it was keeping track of total time before the update But not now.
Has any one elese noticed this.