Control widgets disappear when zooming into rainfall demo

[rw73mg]

Describe the bug
Zooming in to the rainfall map causes the GUI widgets to disappear after about 100 steps.

Expected behavior
The GUI widgets should remain and there should be no flickering when zooming into a .asc image.

To Reproduce
In the rainfall demo simply add a return as the first line to the Rainfall::step() function. Run the demo and after about 100 or so steps, zoom into the image. You'll see the widgets disappear and flickering in the image.

Additional context
This bug is repeatable on Linux and Windows. My application is similar to the rainfall demo. After about 200 steps (for my application) widgets disappear and the image and agents start flickering. But the rainfall demo exhibits the bug even without any agents.

[wang-boyu]

Thanks for reporting this! The issue was probably automatically closed because it was linked to the fix. Now that the fix is merged, would you like to try it out and see if the issue is still there?

Since the fix is not yet released, you'll need to install Mesa-Geo from source. I would recommend installing it in a new virtual environment. In an existing environment it's better to first uninstall Mesa-Geo, then install it from source.

Plus, when the model webpage is open, you'll also need to do a hard refresh, so that cached js files are removed and updated js files are used.

Please feel free to reopen this issue if it's not working.