Hi @alex4 - thanks for the reply!
I did some debugging and realised that the issue was occurring on some pages and not others, despite charts having the same setup. This meant the issue was being caused by something on particular pages.
After a bit of trial and error, I realised that pages with “Chart-Scatter/LinewithTime-Series” charts on them were the ones being affected. I’ve reproduced the issue on the support page by simply adding one of these charts and not changing any chart settings. I’m assuming there’s a conflict in the code for the charts.
Please keep me posted on any fixes. Thanks Alex and the team!