With the timeline feature enabled, I have to switch over to card view to double-click a prior task for it to become the active timer. It sometimes works, but not reliably, to double-click a task in Timeline View and have it become the active timer. Often I have to refresh the entire browser, then switch to card view, double-click a prior task to change the timer, then switch views again, and maybe refresh the view again. Overall, there appear to be some robustness gaps in timeline tracking. Sometimes the double-click works, most of the times it doesn't.