Nothin' but a good time - Chord changes / strum pattern

I’m learning Nothin’ But a Good Time in the app and I’m using the suggested strum pattern. Many measures have a chord change on the “and” of the fourth beat but there is no strum on that beat so I’m not quite sure how to play these. Any help would be appreciated.

Welcome to the Community, Scott.

I’m not familiar with the song, so take this as a general suggestion. Try playing an up-strum on the 4& count with the next chord formed. It can take a little practice to get it right but sounds good when you have it down.