Automatic Platform Optimization weird behavior

Since a couple of weeks I am using APO for a WordPress website. The results are good, faster website and less server load.

But I have some visitors complaining the website is outdated (it is a local news site with daily updates). Multiple of the cases are Android tablets. Is there anything I can do about this? I saw some posts about specific cache rules for mobile devices but they don’t seem to have effect.

I use the WordPress plugin and configured the per device option.