Wierd Icon Behaviour

Hey All,

I was almost very satisfied with myself when an unforseen issue came up and I would be truely grateful if somebody could explain to me what happened. Here is the issue:

My icons are perfectly centered while coding in VS Code and using Live Server, but as soon as I refresh the page, they shift to not being centered. Each time I make some changes, they go back to the center, - making me believe that I nailed the issue - but again shift back. I can't figure out what the problem could be, as at first it always shows the way I want it to be, but the final result is also messed up.... :/

Thanks for any remarks in advance,

Cheers,

Dalma