Note: The closest bug I could find relating to this is MC-6047, but it is labeled as fixed and instead focuses on the first comparator rather than the last.
When a chain of comparators are powered by a 1-tick pulse, they will all transport the signal just fine; until the last comparator. It will not turn on, and the length of the chain doesn't matter either. I also recorded a small video showing the bug, whose link is at the end. To replicate the bug, just rebuild the center of what is shown in the video, and add any number of comparators, as few as one. Here's the link to the video: https://youtu.be/ZlO-NMQiFWI