Samsung s21fe pictures terrible when switching from zoom to standard one ui 7

[Paullangras]

When I turn on the zoom on the video, the picture is clear, but if you switch from zoom to standard or wide angle, and then back to zoom, the picture becomes terrible. Why is that?

[Paullangras]

Here is the file itself, so that you understand exactly what it is about and how it looks during the shooting of the video. 

https://drive.google.com/drive/folders/1-1OeTq-KSsnOMs2rtuT_7zQf-4mlPiWt