Hello. We are using companion ads with Google Publisher Tag in conjunction with Akamai's Adaptive Media Player (AMP). We have a jQuery solution we've used for years and a newer codebase built upon Vue SSR. Recently, in both solutions, our defined slots have stopped rendering as companion ads.
We have inspected the pages but don't see any companion ad-related issues (video, preroll, and regular display ads load fine). Google Publisher Console doesn't report any errors either. But the Google ad iframes still have default ids (google_ads_iframe...) instead of companion ids (google_companion...) and the companion creative is not added to the targeted slot any longer.
We would like some insight into what is happening after the call for show_companion_ad.js is made.