Hi Norbert,
The settings you have look good. Just to rule out any issues with triggers, can you try calling scope.glitch.manual_trigger()? Can you try some different offsets and a larger glitch width? Changing the offset here should ensure there’s nothing weird going on with the clock used to generate the glitch. Increasing the width should make sure your glitch is actually powerful enough to make it to the target.
One final thing to try is to change scope.glitch.output to "enable_only". This will enable the glitch for an entire clock cycle (or multiple if repeat > 1). Be a little conservative with this option, as you might burn out the glitching FET if you leave it on for too long.
Alex