Resizing two "sticky" windows works incorrectly

• Cinnamon version - 5.4.12
• Distribution - Mint 21
• Graphics hardware and driver used

 ➜ inxi -G
Graphics:
  Device-1: AMD Picasso/Raven 2 [Radeon Vega Series / Radeon Mobile Series]
    driver: amdgpu v: kernel
  Display: x11 server: X.Org v: 1.21.1.3 driver: X: loaded: amdgpu,ati
    unloaded: fbdev,modesetting,vesa gpu: amdgpu resolution: 1920x1080~60Hz
  OpenGL: renderer: AMD Radeon Vega 11 Graphics (raven LLVM 13.0.1 DRM 3.42
  5.15.0-47-generic)
    v: 4.6 Mesa 22.0.5

• 64 bit

Issue

Horizontally resizing two half-screen windows that are opened side-by-side results in the right window vertically shrinking by itself.

Steps to reproduce

1. Login to Guest account
2. Open a Nemo window with Super+E
3. Tile it to the left with Super+Left arrow
4. Open a Nemo window with Super+E
5. Tile it to the right with Super+Right arrow
6. Click and drag the mouse left-to-right on the separator between the two windows.
7. See issue. Here's a video:
   cinnamon-2022-09-15T092541+0300.webm

Notice that at the end of the video, the right window (which has now shrunk vertically) does not have a "resize cursor" at the bottom edge of it. So the window still "thinks" that it is vertically maximized.

Expected behaviour

Resizing horizontally should not shrink the window vertically.

No source file, test, or entry point is identified in the issue. Reproduce the behavior in a Cinnamon 5.4.12 Guest session using the listed tiling steps, then trace the separator resize handling and the right window's vertical state. Done means horizontal resizing preserves both windows' vertical size and the right window remains correctly resizable at its bottom edge.