iPhone 15 Pro - Whatsapp: Photos/Videos/Voices cannot be heard/seen in notification previews !

On my new iPhone 15 Pro, there are problems with the photo/video/voice previews of Whatsapp notifications!

- Photo/video: I see a blurry image in the background, I see the loading circle spinning, but it doesn't load and doesn't let me see the photo/video.

- Vowels: I see the vocal bar but it's not loaded and the (play) triangle does not appear.

Until 10 days ago, I was using my old iPhone 6S and iPhone 8 Plus and I didn't have any problems!

P.S.

- All checkboxes on previews in Whatsapp chat settings are active.

- I also deactivated the "FULL IMMERSION"/DO NOT DISTURB functions.

Can anyone help me ?

Thanks in advance !