Creating a rolling credit in version 23.4 is nearly impossible. There's large offset between the cursor and the text as you go on filling the text and its very difficult to edit the text. If anyone's there at Adobe, just try to create a long rolling credit and find the issue. Hope this will get fixed in the next update. I still want the Legacy Title for premiere pro.
Are you able to screen record the issue you're having?
With your clip selected (and set to roll) you should see a little blue scroll bar on the right hand side of the Programme monitor. You can use that to scroll up and down your roller whilst you're parked on single frame; but bare in mind that once you click off, the roller might jump because that's not the actual position of the roller animation on that frame. The actual position will be based on the length of your text and the duration of your clip. You'd need to scrub along the timeline in order to see the text in it's actual temporal position.
How long is the roll? In number of frames.
Rolling credit is 3946 frames. The first issue is, when you first time open the sequence, you have disable and enable track to activate the track that has text. The next one is the rolling credit itself. Its buggy.