Very frequenly ,I am not sure.But about 300hands I play ,lost 1 hands. and oftenly lost showdown hand,so I can not see opponent muckhands.
If I request my hand history ,it still show my email,but I just can not see it at my local stars handhistory file,so my hm2 can not import.
and I fond nanonoko had same problem,in some day his twitch he play nl200 and lost his hand history ,he click stars hands replay ,but did not show .
It very frequenly last two month,before 2017 ,I never see this happen or very few happen.
Anyone has same problem.