Next Button not appearing

This is still an issue for me, I have managed to find a few workarounds, but I just wonder why the "resume saved state" doesn't work. Shouldn't that just recognised where the slide was when the learner left, and then remember if they happen to revisit? 

We need to ensure the learner has read/viewed/heard etc. the content on the slide before continuing. so literally every slide needs to have the next button hidden when they start it and then reveal it at the end for them to continue. But we also need the option for the user to click back through the slides in case they need to revisit something, or they missed something. 

It makes the work twice as much, if not more, to set this up to work, especially when I am trying to create a variance of different slides/experiences to keep the learners engaged e.g click to view more information, click to reveal pictures, click here to watch videos etc. 

"Reset slide works", but then if it is a heavy slide with videos/ interactions etc. it can add a lot of time to the module for the learner, and can also reduce the quality of the experience if they are forced to sit through content unnecessarily again. 

It also means a lot more design time from myself, including testing the module to ensure there are no hiccups with being able to go forward and backwards through the whole slide. Resume Saved State seems to work for everything but the next button.

Sorry if this just seems like i am rambling or complaining, it's just hard when you're looking for an answer and still having the same issue as a 5-year-old thread.