I have a document library set to Classic experience and to open in the client application however it only opens documents in the online versions of the applications.
I have also enabled "Open Documents in Client Applications by Default" in the Site collection features and tried switching it from "Open in the client application" to "Use the server default (Open in the client application)" but this hasn't changed anything.
When I switch to the Modern experience all files open in their client applications as I would expect with the option enabled.
Does anyone know why this is happening or how to fix it? I am using Chrome as my browser.