On my newest projects, when I do a web preview on my app with 2 screens, one with a canvas, the canvas only shows when it is started on the screen with the canvas first.
When pressing the button on the app to change screens, which uses a navigate block, going to a screen without the canvas, then navigating back with another button, the canvas does not show up.
When in web preview, I use the tabs on top to change screens, instead of buttons.
It does work on mobile app on phone.
Here is a link to the app:
Please let me know if you see this problem and have any solutions.