XUMO Box Streaming Netflix in Low Resolution

Love the old FLEX box, works like a charm, never had issue. Unfortunately it got replaced by this XUMO box. I used it to watch Netflix. Watched 5 times so far, 2 out of 5 times it streams in really low resolution, it's so bad that the edge is all rugged/smudged. Don't think it's Netflix's problem -- because whenever this happened, I jumped to a laptop or pad/iphone, and watched the same program, they looked normal. So it must be this XUMO box.

With the old FLEX box, when the connection is not good/stable, it will stream in low resolution for the first 1 or 2 minutes, then it will get better and better. Seems that this XUMO box just lock-in the low resolution mode from beginning to end, which is horrible. The connectivity is not bad either when this happens -- speed tested and it all looks good

Are you guys aware of this? Is there any solution?