W3tc with apo

When apo is enabled with w3tc the header goes missing - no cf-edge-cache: cache,platform=wordpress header
but when w3tc is deactivated this header comes back
does this mean w3tc should be removed and another cache plugin tried
or is there a tweak
the cf-cache header and cf-apo via tcache headers are there

Tried with another caching plugin; still APO header is missing

As I am not working with Wordpress I will tag @yevgen.