The ubuntu2004-arm-1 worker has been unstable in the past and we reduced the number of simultaneous builds from 3 to 1 to see if that would stop the crashes. It didn't at first but now the crashes have stopped. Perhaps due to kernel updates. I'm planning to increase the simultaneous builds back to 3 when the controller is next idle. This may cause the crashes to begin again and I want the SWAT team to be aware of the change.
