When a public link is created for a timeline, there is an option for "Allow opening tasks on click" that we will always turn off, as we don't want clients seeing the details and all the internal comments. However, the internal versions do not have this option. We have client spaces where we add their docs including an overview of processes, a feedback form, and a timeline so they have everything in one place. This is perfect – we don't need them to be able to do anything – they are added as 'comment only' guests. The board view is set to private, as it is an internal board for us to organise the team tasks. And yet if the client clicks on an item in the timeline – they can view the task anyway, along with all of the internal comments. Please add the 'Allow opening tasks on click' option to the timelines as standard, and not just the public links!