This is a post from Fizzymint in the Beta Client News Thread:
fizzymintPlayer Operations Manager
A quick note to mention that reporting feedback as it happens is most helpful, since the feedback tool will automatically grab a screenshot for our devs. However, I understand that some may not want to interrupt their play. If you prefer to wait until later to report your feedback, copying the hand number where you ran into the issue and including it in your report would be a great help.
Could you please follow these instructions when wishing to send in reports. This would be most helpful