However, it’s admittedly far easier to argue against this being a call-ahead to Doctor Strange in the Multiverse of Madness.
(Although the static movement allows arguments that it’s White Vision flying down to Wanda’s cabin, given the Visions’ stiff flight movement.)
Two, it stays in the same section of the screen the entire time it’s visible, which is also indicative of an issue with the camera or digital effects.
As not to exhaust these arguments, I’ll end saying I cannot in good conscience believe Kevin Feige and/or whoever else was involved would have supported an “official” Doctor Strange cameo that could easily be mixed up with a dinky camera glitch.