Black Line blinking next to a image

[AlbertoMeyer]

I'm developing a website and I'm behaving strangely in the images. Next to some (left), a line starts blinking. Any tips? Thanks

[BaconFries]

Without actually seeing the page(s) with this is hard to say. Please either provide a url (temporary) or a demo project showing this. Before sharing the demo see the following
viewtopic.php?f=10&t=82134

[AlbertoMeyer]

Here the image with the line. I put the site (it is just a early draft). Start blinking when i click on menu

https://www.torcidatricolor.com.br/

[crispy68]

I'm not seeing a line on the left of the image. However, the only time something 'blinks' is when I click the HOME button in the menu and this is due to the fact you have a link to the index page associated with it which caused the page to reload when clicked.

[AlbertoMeyer]

The line "blinking" is aleatory. When you click on menu (ex: Home), something starts blinking. Last time i test, it was a small line blinking inside a right layer (white panel)

[AlbertoMeyer]

I tested in Edge Chromium and it is NOT blinking. Strange.

[BaconFries]

As already mentioned I too do not see any blinking line. If you are seeing one it may be browser related and the shadow used in the image getting highlighted more when the page is refreshed on load.