Shushhh, don't tell that out loudcoilbook wrote: i rendered with 21 GPUs fine (4 in master and 17 in slaves). Maybe 20 GPUs is a myth

On a serious not yes it should work without problem even if node or any GPU in chain stops, it still should continue and LOG what stopped and what error it is. Otherwise buying more GPUs/licenses becomes almost uselles if for any GPU failure whole network render stops/waits human interaction. We need some smarter/better networking to restart/bat file as Boris mentioned.
Let's hope DEVs can find solution for this, Thanks.