Hack attempt or bug?

I just did a 2-3 trades in game and noticed that I can't click on anything in the top left corner of the screen.

I use the big pink cursor in POE2, but when I move the mouse to the top left area the cursor turned into a regular Windows cursor and I couldn't click on anything in that area.

I restarted the game and the issue persisted. I restarted my PC and the issue was solved.

Was this some invisible overlay? I read so many speculations about accounts getting hacked after trading, hence my fear.

I don't use any overlays, no mods, apps or anything ingame. I just run POE2 with the Neversink loot filter, that's it. There should've been no reason for this to occur.

Below is the image with the highlighted area in the top left where the cursor went from POE2 pink to the regular Windows cursor and nothing could be clicked ingame.