I don’t know if this makes any difference, but in the notes about VFS, it says:
vfs-read-chunk-size should be greater than buffer-size to prevent too many requests from being sent when opening a file.
The note I’m referring to is in the recently closed pull request:
When i first switched from cache to VFS, I too saw buffering when vfs-read-chunk-size was less than buffer-size.
But after I read that note and made the change, it has been working smoothly.
I’m also using a fairly recent beta.