Thanks for the follow-up @JFrentz,
Yes unfortunately the fix recently deployed only works for single-day tasks without subtasks, so that doesn’t resolve your issue.
While the fix you’re requesting is not prioritized yet, our team is closely monitoring feedback and will consider options in the future. I have intentionally moved your feedback to a new thread in the Product Feedback section to allow other folks running into the same issue to upvote this request. I will keep you posted on Allow to stack multiple tasks in Timeline on a single line as soon as I have an update on my end!