I am not sure that what I’m experiencing is a bug caused specifically by this userscript or not.
I am currently updating my script WK Item Difficulty Indicator with the new turbo events. I have noticed that on the item info pages when I click from one item to the next the updating of the section I injected with this script updates perfectly. When I use the back button though to go to the previous page, somehow the section is completely missing no matter what I do.
I looked into it and it may have something to do with the turbo:before-frame-render event you are using which only triggers on page redirects caused by links not by back and forward buttons.
If the problem lies with my own userscript then I’m sorry to have bothered you, I’m just getting used to handling the turbo events 
Either way, thanks for your hard work!