Persistence of R code blocks seems to fail in specific cases

[Blevvin]

Hi there,

first of all massive thanks for the amazing work on this project!

I'm running a course with materials provided in the form of an online Quarto book, with R code blocks powered by quarto-live sprinkled throughout. I have enabled persistence (I think/hope) for the whole book by providing in my _quarto.yml:

project:
  type: book

jupyter: python3
execute:
  echo: false

book:
  [blahblah]

format:
  live-html:
    [blahblah]
    webr:
      cell-options:
        autorun: true
        persist: true

and on the systems I used to test (Firefox & Chromium on Ubuntu Linux, Firefox on Android) persistence works fine.

Today we had our first tutorial in which students were working on R based exercises. Quite a few students mentioned that persistence doesn't work for them. I did a quick test on one or two of their devices and they seemed to be right. Obviously it's hard to do much in the way of investgating/debugging in that setting, so I thought I'd first ask here whether there are any known issues with this feature, maybe in combination with particular OSes/browsers? If not, then I guess the next step is to try and see if I can get some of them to inspect their browser console for any hints/Javascript errors. Thanks!