1- This is the default behaviour not a bug, note that if you display web content with ads, you can't display mobile ads on top of it.
2- This depends on the adv. publisher fill-rate, it usually not 100% - probably 90-95% of the time.
P.S. This is the first time to see a developer that puts a screenshot of play store in the play store !!
I'm not saying that it's a bug. Just that it's not consistent. Both existing and new in-app should show refresh, share, launch browser and copy link. Or allow us to choose if we want to show them. Why can't the new in-app browser show ad?
I think admod call it match rate now. What actually control the rate? I'm getting 93%, 79%, 82%, 95% before updating to the new version and now it's 57%, 24%, 43%, 57%. The rate dropped after the update to the new version.
I'm still doing other updates and will update the play store too. Ha ha.