resetPresetTargeting not available for setTargetingForAst

[markuspovelainen]

Seems that the resetPresetTargeting is missing from setTargetingForAst. https://github.com/prebid/Prebid.js/blob/master/src/prebid.js#L211-L222

This is a problem on SPA sites using Appnexus ad server as the prebid library sets the old key-values for ad placements when you move to the next page.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[mkendall07]

this is resolved with #3448

[markuspovelainen]

I'm sorry to say but it doesn't clear the prebid globals for targeting. Meaning if you get a bid from page 1 and do SPA-style page change to page 2 which you don't get bid prebid still has the previous values in globals which will be set as a keywords to Appnexus on page 2. Seems that for for gpt global clean up is defined here: https://github.com/prebid/Prebid.js/blob/master/src/prebid.js#L190
ping @mkendall07

[deekshithraop]

Hey @markuspovelainen would you be able to setup a test page where we can see this actually happening please.