The hashrate meter is working for me now. Don't know if it is because you changed anything. I didn't change anything.
No, nothing changed here. It may be a bug that happens rarely.
It happens sometimes, not every time. I haven't kept a log so I can't tell you how often it happens. But more than just rarely. Maybe 1 in 4 times.
Hope you can find what causes it. Although it's not that important a function, it is a nice feature.