It rarely happens with me as well, but I think we just kinda learned to not be persistent when we speak. The blocks have to take their time, regardless of if you have to say something in the right moment or not. But how bad do you have it? I unknowingly habituated myself to raise my index finger when I'm in a middle of a block during a conversation with people who don't know me well. Like "hold up a bit mate, I gotta unfreeze here."