[Bug] Zoom to saved region not working properly with "Constrain display resolution to computational settings"

[HuidaeCho]

Describe the bug
Zoom to saved region with "Constrain display resolution to computational settings" draws a small red rectangle in the middle of the monitor, but the rendering is zoomed in. On pan, the full extent of raster is rendered.

To Reproduce
Steps to reproduce the behavior:

# NC sample dataset
d.mon wx0
g.region rast=elevation
d.rast elevation
# zoom to a small region
# Save display geometry to named region "test"
# Constrain display resolution to computational settings
# zoom to full extent
# Zoom to saved region "test"
# see the screenshot below
# pan and see how rendering *expands* to a bigger region

Expected behavior
Zoom to saved region properly and pan should recognize the new region.

Screenshots

System description (please complete the following information):

• Operating System: Linux
• GRASS GIS version: main branch

Additional context
Zoom to saved region works fine without "Constrain display resolution to computational settings" so I think it's a problem with the constraining setting.

The test was done without #3500.

Related issues: #3503, #3504