First time I've seen this, after updating to today's update.
Playing DONs tonight on Merge (Lock) keeping 4 tables going. After awhile, maybe 8-10 tables total, there would be 2-3 players per table whose stats wouldn't update in the HUD. It shows 0 hands and -'s for all stats, except for their BB and M stats, which were updating correctly. The HH's were importing as mine and other players' stats were updating at the same table.
I tried stopping/restarting the HUD, and it didn't help.