Hi @Schriverb87,
If @RachelSalmon's suggestion doesn't work, it would seem that this is more of a google issue since the incorrect content in the iframe is coming from them and is out of Canvas' control. I haven't encountered this issue from any of the faculty at my institution recently (and we are a Google campus), so it's also possible there is something specific in your presentation that is no longer supported in slides. Unfortunately, it's hard to get support for Google products like slides, but if your school/institution has an IT help desk, I'd suggest asking if they have anyone who could help with this.
-Chris