On my Essential phone with Snapdragon 835 (Adreno 540) & Android 10, the menu after "PRESS START BUTTON" won't show up in Yaba Sanshiro Pro 2.12.0 with default settings (completely missing without up/down arrow at all). Adjusting "Cpu Core", "Polygon Generation Type", and "Use Compute Shader" settings didn't help.
But this menu does show up properly in the latest RetroArch with Yaba Sanshiro core.
Also, I did not encounter this invisible menu issue on my Shield TV (Android 9) with Yaba Sanshiro Pro. Maybe just an issue with Adreno GPU's OpenGL driver.
devmiyax
commented
4 years ago 
The problem is similar to the one reported here (but not exactly the same): https://github.com/devmiyax/yabause/issues/35
On my Essential phone with Snapdragon 835 (Adreno 540) & Android 10, the menu after "PRESS START BUTTON" won't show up in Yaba Sanshiro Pro 2.12.0 with default settings (completely missing without up/down arrow at all). Adjusting "Cpu Core", "Polygon Generation Type", and "Use Compute Shader" settings didn't help.
But this menu does show up properly in the latest RetroArch with Yaba Sanshiro core.
Also, I did not encounter this invisible menu issue on my Shield TV (Android 9) with Yaba Sanshiro Pro. Maybe just an issue with Adreno GPU's OpenGL driver.