I've just commented out the release version on my workflow yaml for now.
It's passed on the remaining 3 platforms
Last week, one of my other packages was failing because the architecture for testing on Mac OS devel was broken, and I noticed re-running
usethis::use_github_action("check-standard")
switched this over to the Ubuntu 20.04 development version.
(That package doesn't have a vignette yet, so it passes all tests on all platforms).
Hope someone can throw some light on this though 