Falling raster while zoomed in falls off the screen

[moglebean]

Description
When x-zooming in on a falling raster, the y-axis freezes and data "falls off" the display.

To Reproduce

1. Go to http://sigplot.lgsinnovations.com/sigplot-2.0/inaction.html
2. Click real-time plots -> streaming
3. Zoom in by left-click-dragging on the 1d plot. Note how the 2d plot correctly mimics zooms the x-axis on the scrolling raster and the data continues to scroll as expected. Unzoom with right click.
4. Now click drawmode->falling raster
5. Zoom in by left-click-dragging on the 1d plot. The 2d plot mimics the x-zoom, however the y-axis is frozen in time and as additional data is pushed black starts creeping in from the bottom on the picture

Expected behavior
In falling raster mode, the y-axis will continue falling when zoomed in on the x-axis.

jsFiddle

Can produce one if needed, but the main website demonstrates the issue.

Screenshots

Falling raster with frozen axis and blank image creeping in from the bottom.

If left in this state eventually the entire raster "falls off the edge"

Desktop (please complete the following information):

• Windows 11
• Chrome
• Version 96.0.4664.110 (Official Build) (64-bit)

[sterre]

Just confirming that I see the same behavior, even if I choose Falling Raster as the Drawmode before zooming in the first time. I also notice that the "falling off the edge" behavior doesn't occur until the main raster has filled up; prior to that, I just see that the zoomed raster is not updating, including the side axes.