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My other campaigns are working well and I can see those ads when I use the relevent keywords.
Seems to apply particularly to Broad match terms, and on some of mine I dont even appear for the term itself. Of course ill now try adding the exact match but the broad matching terms certainly dont work the same way that they used to.
I think there may be a bug or something as the ad diagnostic tool says its under budget despite a huge budget being set on the campaign so ill follow it up but id love to hear from anyone seeing the same thing?