It looks like after a while the wallet is stopping to stake, I cannot really understand why. If I colose it and re-open it it would start again...
I watched something like this, but did not attach much importance. I thought it was just a coincidence. But if already 2 people thought about it, then it's not like a simple coincidence.
I also didn't give it too much importance given the current low price if the coins, but if it is a technical problem, it should be addressed. I don't experience this with other coins i am staking.