Krypton turning off my box?

I have two strange issues that only occur on Krypton, using RC3.

I’m using an Amazon FireTV. When I select the Kodi app from the menu, the TV itself will mimic a power down, or even an input change. Everything goes black, then I see the Input and Resolution, then either the home screen or Kodi comes up. Whichever I was switching to. Very strange. The input and/or TV Resolution doesn’t change at all.

Then, almost any addon just constantly loads or buffers, and won’t actually open/work, and I don’t mean banned addons. I mean program addons as well.

Any thoughts?

Thanks!