As I said previously, the parameters shown in the app reflect the v2 parameter implementation. The parameters are handled differently in OVMSv3 and it has not all been backported into the v2 server code so you should not expect the new parameters to be visible in the app.
In my tests with cooldown I have found that the car's algorithm must consider the battery to be cool enough when it reaches 31C. The trick of switching into and out of range mode is how OVMS tries to tell the car to cool the battery, but what the car actually does is determined by its own algorithm. Mark describes it as voodoo.