No, I haven’t spoke to a Dr about this possibly I should. The only other time it happens, and this isn't very often, is when I am sleeping.
I had a similar issue, my entire arm would go numb starting with my pinky and ring finger. At first it was only when I had my arm bent beyond 90° for more than 5 min. Then it was so bad that I was unable to open a door with a knob, I could not grip the handle tight enough to turn it with my left hand. Went to the doc and was sent for nerve response testing (EMG?). They hooked wires up to all my fingers and then shocked me at different points on my arm. Nerve damage was to blame in my case, doc told me to live with it as long as I can as surgery was the only option.
Turns out this was all caused by how I was sleeping, I would always sleep with my left arm bent under my head. I started waking up every night in pain (entire arm throbbing). Now I sleep with my arms at my side and almost all of my issues have gone away.
Inflamed tendons in my wrist were compressing the damaged nerve, I found some stretches on youtube for tendinitis that have helped as well.
Hopefully you solution is as simple as mine was, it has been 3 years now for me living and playing pain free.