Stuck in GE

I’ve been working on paruresis for a few months and have made some progress. I can pee at urinals when no one else is there, when people are in stalls, and can even hold my stream if someone walks in mid-flow. But I can’t seem to start my stream if someone is already at the urinals or just in the bathroom when I arrive. I’ve been stuck at this stage for a while and I can’t bridge the gap to actually going with someone already present. Has anyone been at this specific stage and gotten past it? What worked?