Yes on ossc display, soon after turning on the console. I tried at first sega rally and athlete king. No issues. Afterwards with Panzer Dragoon zwei the resolution changed to 313p. Dunno why.
Now every time I turn on the console the OSSC dipslay reads 313p with black screen on my TV. In order to see a picture, I have to toggle output to 240/288p line 2x.
But it’s cut at the bottom and partially doubled.