New update behavior?

After I got the automatic update working again, I noticed that sometimes when I launch Brave, it starts with a thin blue border around the main window. When this happens, the window disappears again, and re-appears without the border after a short period of time. Is this blue border a new behavior? (because I haven’t seen it before, it started with the 1.9.55 version)

(I’m running on 64 bit Windows 7 SP1 by the way, and Brave Dev is now at 1.9.62)