Or, and this was my own ah-ha moment: losing valuable context on where you are currently. Exiting one activity to start another, in the fear of losing progress and momentum on something you -did- manage to activate on. Not wanting to give up the -previous- victory over inertia.
So one of the many things I can try now (none of which ALWAYS work) is naming the physiological aspect. My body is recoiling as if I’m about to fight a bear. But do I actually see a bear? No. So shake it off
(And move on to the next procrastination complex…)