That doesn't sound like one of the common Roku-related problems people have. I'd say it's hardware. Only 2 months into ownership, I would start a warranty claim. I wouldn't waste any time. I don't know about Sanyo, but some makers will say it's a Roku problem. You can end up wasting valuable warranty time. If you get the feeling Sanyo's doing that, I would be assertive about the tv not working as Sanyo warranted it to work, and any problem they have with Roku is *their* problem.
"People are often amazed at how much we’ve done with the number of engineers we’ve got." (Roku CEO Anthony Wood, Austin Statesman, Oct 4, 2019). "Amazed" is one way of putting it.