Venus OS 3.60 + DESS: why is PV surplus not exported with full battery?

Since the latest Venus OS update, I notice that when the battery is full, the PV surplus is not exported — even though PV surplus export is enabled. It looks like DESS blocks export unless it decides to allow it.

I have already tried disabling DESS and restarting the system, but the issue remains. How can I configure the system to always export PV surplus as soon as the battery is full, even with DESS active?