PowerApps showing trial on licensed account

We have Office 365 Enterprise E3 licenses for all our users and have been using PowerApps for a long time now. Yesterday, I had a couple users who login to PowerApps regularly get a "Start my Trial" screen. I have never seen this before and I checked their licenses were still correct and also have PowerApps ON. Once they click "Start My Trial", then PowerApps works normally. Just wondering if this is going to keep popping up. Anyone else experience this?