Flipper@connerdev: transition has visual glitch

[Mintulix]

• Extension version/Build date (to be found in "About.." or in "metadata.json")
  "last-edited": 1510827553

• Cinnamon version (cinnamon --version)
  4.0.8 and before

• Distribution - (Mint 17.2, Arch, Fedora 25, etc...)
  LM 19.1

• Graphics hardware and driver used
  Device-1: Intel driver: i915 v: kernel
  Display: x11 server: X.Org 1.19.6 driver: modesetting unloaded: fbdev,vesa
  OpenGL: renderer: Mesa DRI Intel HD Graphics (Coffeelake 3x8 GT2)
  v: 4.5 Mesa 18.0.5 compat-v: 3.0 direct render: Yes

Issue
During any desktop transition both panels (upper and lower) are shown stacked at the top of the desktop. The lower panel is not there. After the transition is done, both panels are ok again.

Steps to reproduce
Use two panels, one at the bottom and one at the top.
Switch to other desktop using Flipper with keybord (ctrl + alt + right arrow)
-> bottom panel is not shown during transition, bottom and upper panels are shown stacked on upper panel.
Slow down transition to see the effect better.

Expected behaviour
Panels should stay where they are during transition.

Other information
This bug is not new, I saw this in versions before Cinnemon 4.0 also.

[SL-Pirate]

If the CPU is pretty busy (like a lot busy), the bottom panel won't get down again. That's a real pain in the A** cuz it won't fix until you restart. This happens like every time I play minecraft with my friends. So I have disable flipper every time I play it. :-/

[AuguB]

Same issue here with a fresh install of Debian 11 with Cinnamon. Sad because this makes the whole transition feel glitchy.

[klangman]

I believe this should be fixed now, and if some other panel issues appears, you now have an option to not include the panels in the animations.

[rcalixte]

Fixed in #712