Missing zonelines while alt-tabed?

[Tecmos Deception]

I don't remember this ever happening to me before about a week ago, but now in the last week I have managed to click out of my wineq p99 window to a browser while autorunning towards a zoneline... and then I click back to EQ and I've run past the zoneline without zoning and I'm at the edge of the world on the back side of the EC tunnel or a alley from nfp to wfp or what have you.

Anyone else experiencing this recently/ever?