Square-like shapes in the corners when fading is enabled

[dybdeskarphet]

Platform

Arch Linux 5.17.1

GPU, drivers, and screen setup

• AMD Ryzen 5 5500U Radeon Graphics
• xf86-video-amdgpu 22.0.0-1
• Mesa 22.0.1

glxinfo -B

name of display: :0
display: :0  screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
    Vendor: AMD (0x1002)
    Device: AMD RENOIR (LLVM 13.0.1, DRM 3.44, 5.17.1-arch1-1) (0x164c)
    Version: 22.0.1
    Accelerated: yes
    Video memory: 2048MB
    Unified memory: no
    Preferred profile: core (0x1)
    Max core profile version: 4.6
    Max compat profile version: 4.6
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 3.2
Memory info (GL_ATI_meminfo):
    VBO free memory - total: 1699 MB, largest block: 1699 MB
    VBO free aux. memory - total: 3019 MB, largest block: 3019 MB
    Texture free memory - total: 1699 MB, largest block: 1699 MB
    Texture free aux. memory - total: 3019 MB, largest block: 3019 MB
    Renderbuffer free memory - total: 1699 MB, largest block: 1699 MB
    Renderbuffer free aux. memory - total: 3019 MB, largest block: 3019 MB
Memory info (GL_NVX_gpu_memory_info):
    Dedicated video memory: 2048 MB
    Total available memory: 5120 MB
    Currently available dedicated video memory: 1699 MB
OpenGL vendor string: AMD
OpenGL renderer string: AMD RENOIR (LLVM 13.0.1, DRM 3.44, 5.17.1-arch1-1)
OpenGL core profile version string: 4.6 (Core Profile) Mesa 22.0.1
OpenGL core profile shading language version string: 4.60
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile

OpenGL version string: 4.6 (Compatibility Profile) Mesa 22.0.1
OpenGL shading language version string: 4.60
OpenGL context flags: (none)
OpenGL profile mask: compatibility profile

OpenGL ES profile version string: OpenGL ES 3.2 Mesa 22.0.1
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20

Environment

bspwm

picom version

vgit-7e568

Diagnostics

### Extensions:

* Shape: Yes
* XRandR: Yes
* Present: Present

### Misc:

* Use Overlay: No
  (Another compositor is already running)
* Config file used: /home/skarphet/.config/picom/picom.conf

### Drivers (inaccurate):

AMDGPU, Radeon

### Backend: glx

* Driver vendors:
 * GLX: Mesa Project and SGI
 * GL: AMD
* GL renderer: AMD RENOIR (LLVM 13.0.1, DRM 3.44, 5.17.1-arch1-1)
* Accelerated: 1

Configuration:

Configuration file

#  _. _ ._.._  _ ._. __
# (_.(_)[  [ )(/,[  _) 
# 
corner-radius = 17

# Exclude conditions for rounded corners.
rounded-corners-exclude = [
  "name *= 'gromit-mpx'",
  "_NET_WM_STATE@[*]:a = '_NET_WM_STATE_FULLSCREEN'",
  "window_type = 'dock'",
  "window_type = 'notification'",
  "window_type = 'desktop'",
  "class_g = 'dmenu'"
];

#    .       .            
#  __|_  _. _| _ .    , __
# _) [ )(_](_](_) \/\/ _) 
# 
shadow = true;
shadow-radius = 10;
shadow-offset-x = -7;
shadow-offset-y = -7;

# shadow-red = 0
# shadow-green = 0
# shadow-blue = 0

shadow-exclude = [
  "name *= 'gromit-mpx'"
];

# shadow-exclude-reg = "x100+0+0" 


# ._     .       
# |, _. _|*._  _ 
# | (_](_]|[ )(_]
#             ._|
# 
fading = true
fade-in-step = 0.03;
fade-out-step = 0.03;
fade-delta = 10

# fade-exclude = []
no-fading-openclose = false
no-fading-destroyed-argb = false

#               ,    
#  _ ._  _. _.*-+-  .
# (_)[_)(_](_.| | \_|
#    |            ._|
# 
active-opacity = 1.0
inactive-opacity = 1.0;
inactive-opacity-override = true;

frame-opacity = 1.0;
menu-opacity = 1.0

inactive-dim = 0.0
# focus-exclude = []
opacity-rule = [ "70:class_g *= 'conky'" ];


#                   .
#  _  _ ._  _ ._. _.|
# (_](/,[ )(/,[  (_]|
# ._|
# 
daemon = false;
backend = "glx";
refresh-rate = 60
vsync = true
dbus = false

mark-wmwin-focused = true;
mark-ovredir-focused = false;
detect-rounded-corners = true;
detect-client-opacity = true;
use-ewmh-active-win = false;
no-ewmh-fullscreen = true;

unredir-if-possible = false;
unredir-if-possible-delay = 10;
# unredir-if-possible-exclude = []

detect-transient = true
detect-client-leader = true

# invert-color-include = [
# 	"name *= 'Chromium'"
# ];

glx-no-stencil = true;
glx-no-rebind-pixmap = true;
use-damage = false;

# xrender-sync-fence = false
# max-brightness = false

# .      
# | _  _ 
# |(_)(_]
#     ._|
# 
log-level = "warn";
show-all-xerrors = true

#            ,             
# .    ,*._ -+-  .._  _  __
#  \/\/ |[ ) | \_|[_)(/,_) 
#              ._||        
# 
wintypes:
{
  tooltip = { fade = true; shadow = false; opacity = 0.75; focus = true; full-shadow = false; };
  dock = { shadow = false; }
  dnd = { shadow = false; }
  notification = { full-shadow = true; }
};

Steps of reproduction

1. Enable rounded corners
2. Open a window
3. Close a window

or

2. Change workspace
3. Change workspace again

Expected behavior

No shapes or shadows

Current Behavior

Like in the video, square-like shapes in the corners when the windows are fading

Other details

[dybdeskarphet]

It gets fixed with --experimental-backends but now the shadows are looking like this: