Hi @stucork, thanks for the reply!
It is now indeed working automatically in my clone linked app (did you change something??), but in my main app (where the plotly graph is a lot more complex) it resizes when the sidebar gets hidden (i.e. the plotly graph “grows”), but it doesn’t resize when the sidebar returns.
Here is a clone link to my main app, but it’s a complex app and not super well structured, so not expecting you to make sense of it. If you want to try it, just let it load the graph (takes up to 10 seconds in total) and then hide and reshow the sidebar - of course you are invited to try the other functionality, but it may crash on you constantly 