I read that's why Bronn left the dragon pit before Cersei got there and that they refuse to work together due to their relationship in the past.
Makes sense really given how they seem to have gone out of their way to avoid Bronn/Cersei scenes. Really odd that Jaime didn't take Bronn with him regardless, but even more so if he won't be part of Cersei's KL storyline.
I've heard it said many times, over the years.
That doesn't make it true, of course, but it seems plausible enough.
I can't think of another explanation for Bronn leaving the meeting before she arrived. That made no sense whatsoever.
And how pitiful that they can't act professional enough to film scenes together due to break up over a decade ago even when they don't even directly interact. Pfft.
Cersei told Jaime he should kill Bronn for arranging that meeting with Tyrion and Jaime. I'm not sure it's really that big a thing now for them to not do scenes together. It was at one time. Could be just something else they threw in to show they are self aware. Like the joke about Gendry rowing.
Another interesting thing about the dragon pit scene, starting from the walk up, every main character had at least 1 line.