“GET link HTTP /1.1” without actually entering the links

So, I'm suspecting from some malicious activiy on my PC so I perform a WireShark scan once in a while.

When I open my Steam account in another PC, the activity on WireShark looks pretty normal.

But when I open Steam on my main PC, once in a while this shows on WireShark:

"GET /my/tradeoffers/ HTTP/1.1" "GET /id/mysteamnickname/tradeoffers HTTP/1.1"

Protocol: TCP

For those who not know, those links are required to accept trade offers (sending or receiving Steam itens to others). But I never check those links when I log in, and specially that day I did not.

On my other PC, a notebook, when I open Steam these lines does not appear at WireShark.

Does anyone can help me on what this might mean?