Hi Simon,
I have a few questions for you before we can dig too deeply into the issue. Firstly, are you using IMA Client-side or DAI?
If client side, can you provide us with a sample ad request tag that returns ads showing the broken Ad-Choices Icon?
If DAI, can you provide us with stream credentials, such as Event Id or Video ID and CMS ID that will return ads showing the broken icon?
Thanks,
Greg Schoppe
IMA SDK TEAM