See the attached example from the Advanced training course. Click the red fade/in out box, which animates the opacity from 1 to 0 then back. At the point of opacity=0 the box flashes to black, back to transparent, and then animates back to opacity=1.
Might be related to
TIMOB-5460? In prior TiMob releases, we got a flash of the splash screen (heavyweight window) which no longer happens.
Attached example works fine on iOS.