Manual Native ad in andriod does not show Ad Media in production and in test mode both ad icon and ad image is not showing

[AzizFasihHazel]

MAX SDK Version

12.1.0

Device/Platform Info

Android 13 , google pixel 4

Current Behavior

Manual Native ad not showing icon and media view in test mode and in production icon is showing but the media is not showing. It shows the media once but not at all the places. I have native ads on various screens in my app with same native ad layout but it only shows media once and only at one place.

Expected Behavior

Should have show test icon and test media like banner and inter in manual native and have to show media every time in live app

How to Reproduce

Simply implement manual native ad and show all other data comes instead of icon and media in test mode. getting icon and media view null in test mode as you can see in screenshot.
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In production icon is showing but the media is not showing I implement it 5 days before and only 1 time it shows media at only one place not on the others screens.

Additional Info

test mode nativeAd