Windows 10: Strange Delay/Pause when saving files

Hi, since 1 week or a bit more I'm experiencing a very strange thing on Windows 10 PRO 20H2 (build OS 19042.804)
There is an unusual delay when saving files that is very hard to describe, please let me provide an example first, then I'll go into details of things I have already tested.

Let's say I want to save an image I have displayed on a website, in one of my browsers.



I simply right click on it, save as, a prompt window will ask me where to save my file to



As soon as I picked up a position, I'm gonna see the icon of downloaded/downloading file on the left bottom corner of the screen. If it's a small file it's gonna be instant, if it's a large one I'm gonna see a progress bar etc.




Now the issue I'm having is between step2 and step3.
As soon as I confirm where to save (step2) and the prompt window disappears, I have a 6+ seconds pause before the next part (step3) actually happens.
This is not a big issue but it's super annoying and I can't understand what may be causing it.



Some things I have already tested:
1) It's not the disc. This issue happens on SSD1, SSD2 and HDD1
2) It's not the browser, it happens on Chrome, Edge and Firefox
3) It's not the antivirus (I think?), I use Nod32, I completely deactivated the Antivirus for 10 minutes, but the issue was still happening
4) It doesn't happen 100% of the times, more like... 9 out of 10? Very very often, but not always.
5) It doesn't depend (I think?) on the specific folder I pick to save my file, I tried like 3 or 4 different ones, it still happens.
6) It seems to be happening not only if I'm downloading an image from a browser, but also if I'm in a software and I select the option to save my file (through the "save as" option) somewhere manually. When I do this the software seems to pause/lock for a few seconds, then everything proceeds smoothly.



So I'm a bit clueless on what could be causing this, I'm willing to perform more tests but I ran out of ideas.




Edit:
Added direct images and also adding a 17mb mp4 video uploaded on my Google Drive

:)

 

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