Strange issue of point not drawing on canvas initialize in simple program

[antyale]

I am a beginner with MIT App Inventor. I am making a very simple program where on initialization of the screen, a point is drawn. However, no matter what I do, no point will draw on initialization. I can get the point to draw in plenty of other ways and places, but not on the initialization of the screen. Any ideas why?

[TIMAI2]

Most likely the canvas has not had enough time to collect its coordinates (height/width) on initialisation.

The way around this is to use a clock timer, usually with an interval of 250ms, before trying to draw your point

Note, when I test with companion on my Pixel 4a, I do not need to use a clock timer...