iPhone XS Max burn in

hi there!!, I have an iPhone XS Max, from late-October, auto brightness & TrueTone activated... well, some days ago, I noticed in my OLED panel, the "home bar" stays there inclusive in the section "app switcher" but the bar its difficult to see, seriously you can see if you search for it, because is too tiny... well anyone with this problem?? its burn in or image retention??