Hi Joshua -- Chrome is a supported browser. I'm using Chrome v84 as well and generally am not seeing issues loading web maps in ArcGIS StoryMaps.
However, there are some layer types that are not supported in ArcGIS StoryMaps and the latest Dashboard beta because those apps use the latest 4.x version of Esri's JavaScript API.
Can you please provide more information about what specifically what types of layers are not working for you? If you can also share a link to your web map (and also make sure it's shared with Everyone), that would be ideal so we can see the issue and help troubleshoot.
Owen Evans
Lead Product Engineer | StoryMaps