Advanced Development Board stops responding

I have a new ADK board, H/W rev 1.3.1, F/W 3.4 supplied with the SLG4DVKINTRO. No updates appear to be available.

I have a simple design for SLG46826V, created using Go Configure / GreenPAK Designer V6.44. Running on Win 10, 22H2.

I'm using a slow (6s period), sine generator to one pin on the device, and a couple of emulated push button inputs.

This all works in s/w emulation.

When emulation is run on the ADB, it usually works for some time, but user input (button presses within Go Configure), causes the system to lock up.

Occasionally it will recover, but usually it requires the ADK to be disconnected from the USB port, and reconnected, before the GF IDE can gain control again.

GP designer reports "Device didn't answer - The board didn't connect within the expected timeframe.Please reconnect the board and try again."

I believe the fault does not occur if I don't run the slow sine generator.

Is this a known fault with the ADB, or with designs using the generator on the ADK? Any suggestions to avoid this fault?