This is likely the issue. Both of those woods are famously incompatible with normal stains. Gel stains are what most people recommend for those woods. I have also had decent luck with Saman stains with the right preparation and great results with Omnia natural oil.
Yes. I have a personal app that I made many years ago and used on my Pixel 4 and 6. It would not work on my 8 until I updated the sdk version and some of the tooling.