Hi @Ch8,
Welcome to the Roku Community!
We're sorry for the inconvenience and we appreciate your report about this.
If you see this happening again try to turn on the volume leveling during playback and see if that helps when the commercial comes on.
We've got you covered on how to proceed here: How to use volume modes on your Roku® streaming device
Thanks,
Rey
ERey.
Roku Community Moderator