AVAsynchronousCIImageFilteringRequest source image is empty

I use AVMutableVideoComposition(asset:applyingCIFiltersWithHandler:) to apply CIFilter for each frame. Here is my code:

let mainTrackAsset = AVAsset(url: url)
    let mainCompositionWithFilter = AVMutableVideoComposition(asset: mainTrackAsset) { request in               
        let source = request.sourceImage
    }

It works fine with video recorded from device, but if I save video from web (e.g. upload video to Google.Drive and save it back to device) , source is an empty CIImage

fill [0 0 0 1 devicergb]
extent=[infinite][0 0 1 1]
opaque

The only difference between recorded and saved from web videos is that first element of mainTrackAsset.tracks has media type `video` for recorded and `audio` for saved from web

Is it a bug in AVFoundation or I've not understood how it works?

Is there possibility to rearrange indices of mainTrackAsset.tracks?