XRGB-3 B1 mode

[cm8833]

Hello,

I've some trouble with the xrgb3 and somebody mentioned that I might find support here.

I'm using the xrgb3 for almost two weeks now, mainly for PS1 and Saturn via RGB. There were no problems until yesterday. When I switch to B1 mode now, the picture starts to flicker massively. Flickering stops when I switch back to B0. I tried different firmwares (2.07, 2.11, 2.12) with Vsync turned off and on but it didn't affect the flickering. Besides, to activate B1 I have to turn "power" off and on again. Formerly B1 mode was directly activated when I switched to it.

Any idea what could be wrong?