[Linux Mint 22] Calculator's equal button has bad gradient

[LJNeon]

See title and the attached image (especially compared to the backspace button). This is my system information:

System:
  Kernel: 6.8.0-51-generic arch: x86_64 bits: 64 compiler: gcc v: 13.3.0 clocksource: tsc
  Desktop: Cinnamon v: 6.2.9 tk: GTK v: 3.24.41 wm: Muffin v: 6.2.0 vt: 7 dm: LightDM v: 1.30.0
    Distro: Linux Mint 22 Wilma base: Ubuntu 24.04 noble

[LJNeon]

Seems like it's not just the calculator button, the launch button in the software manager also has the bad gradient that looks ugly and makes it somewhat hard to read all of the button text.