Black corner cutout

[GrbavaCigla]

Platform

GPU, drivers, and screen setup

NVidia GeForce 150M, nvidia-drivers Mesa: 20.1.1-1. GLXINFO:

display: :0  screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
    Vendor: Intel (0x8086)
    Device: Mesa Intel(R) UHD Graphics 620 (KBL GT2) (0x5917)
    Version: 20.1.1
    Accelerated: yes
    Video memory: 3072MB
    Unified memory: yes
    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
OpenGL vendor string: Intel
OpenGL renderer string: Mesa Intel(R) UHD Graphics 620 (KBL GT2)
OpenGL core profile version string: 4.6 (Core Profile) Mesa 20.1.1
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 20.1.1
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 20.1.1
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20

Environment

i3-gaps

picom version

version: vgit-a9977

**Version:** vgit-a9977

### Extensions:

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

### Misc:

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

### Drivers (inaccurate):

modesetting

Configuration:

backend = "glx";
vsync = true;

corner-radius = 16;

fading = true;
fade-in-step = 0.075;
fade-out-step = 0.075;

frame-opacity = 0.8;

active-opacity = 0.1;
inactive-opacity = 0.1;
opacity-rule = ["100:class_g = 'rofi'"];

shadow = true;
shadow-exclude = [
    "name = 'rofi'"
];

Current Behavior

In corners there is small black cutout (look at the corner of inactive window)

[GrbavaCigla]

When I change backend to xrender it works