Certain apps keep freezing after playing for a short period Alibi Disney to name a few
Alibi is not an app. It is a channel as part of the Entertainment NOW membership.
Have you made sure the stick is fully updated?
Have you unplugged the stick and your router for a few minutes?
Worst case set the stick back to factory settings.https://help.nowtv.com/article/hard-factory-reset-now-box-stick