This is telling for two reasons.
First, it is not at all uncommon for someone in a leadership role to be "working with" others. In fact a good leader doesn't assume he or she knows everything and would consult with, work with, experts in the field. So why the concern? Someone has become overly sensitive to this. Perhaps it is the other gaffes by Biden that reveal he is not merely "working with" others but in fact taking instructions from others? I can see why Biden's controllers would be sensitized to this now. This pulling the plug on an innocuous statement gives it away.
Second, perhaps another reason for dementia-Joe's handlers' knee-jerk reaction of pulling the plug was a fear of what was coming next. Maybe they were afraid (probably rightly) that sleepy-Joe was about to name exactly who he had been "working with" and those players very much want to remain in the shadows. No-doubt Joe has been drilled to "not talk about" them. But we've heard him slip up and talk about or do things he's been told not to do or say. His decline is obvious, and he is increasingly prone to forgetting what he's be told to do or say, or not do and not say. Hence the handlers' fear and plug-pulling.
Perhaps he was going to say, “I’ve been working with some others, including Klaus Schwab, on the Great Reset and I understand Klaus wants it to move ahead faster, so we will be making more of an effort in this area.”