Roku_Ads, no "% of video ad rendered" events

Library "Roku_Ads.brs"

adIface = Roku_Ads()
adIface.setTrackingCallback(adTrackingCallback, {
  ...
}

sub adTrackingCallback(obj = invalid as Dynamic, eventType = invalid as Dynamic, ctx = invalid as Dynamic)
if eventType = "Impression"
  ...
else if eventType = "FirstQuartile"
  ...
else if eventType = "Complete"
  ...
end if
end sub

Has anyone encountered this, I'm not getting any events for "% of video ad rendered". It looks like the eventType in those cases comes as Invalid
Btw, I do get PodStart/PodComplete events only these don't get triggered

I'm talking about these: https://sdkdocs.roku.com/display/sdkdoc/Integrating+the+Roku+Advertising+Framework#IntegratingtheRokuAdvertisingFramework-Tracking
Any ideas what's going on ?