I haven't tried modifying the preferredContentMode in the callback. At least, modifying the preferredContentMode when initializing the webview doesn't seem to work

Modifying the preferredContentMode when initially creating a webview doesn't seem to work. I temporarily solved this problem by modifying UA to the iPhone identifier.

Modifying the preferredContentMode when initially creating a webview doesn't seem to work. I temporarily solved this problem by modifying UA to the iPhone identifier.

Modifying the preferredContentMode when initially creating a webview doesn't seem to work. So I temporarily solved this problem by modifying the UA method based on the device type.

I also encountered the same problem & logs. And found the reason: I passed the wrong attribute type of SKAdImpression. For example, it needs to set an attribute value of type NSNumber, and I assigned a value of type NSString. After modification, the block can be called back normally. Hope to help you.