Kitty sometimes looks like this.

Other applications also break from time to time.

The font becomes legible if I highlight it, or if I refresh the window.

Any ideas?

PS: please let me know if there are any command outputs that I could post that could shed some light.

PPS: to me, this looks like the data of the image of the rasterized font is being sent to the wrong sized box -- like if you got an image and messed with the header saying what dimensions it has. Which is weird.

|~ fc-match --verbose
Pattern has 43 elts (size 48)
    family: "Noto Sans"(w)
    familylang: "en"(s)
    style: "Regular"(s)
    stylelang: "en"(s)
    fullname: "Noto Sans Regular"(w)
    fullnamelang: "en"(s)
    slant: 0(i)(s)
    weight: 80(f)(s)
    width: 100(f)(s)
    size: 12(f)(s)
    pixelsize: 12.5(f)(s)
    foundry: "GOOG"(s)
    antialias: True(w)
    hintstyle: 1(i)(w)
    hinting: True(w)
    verticallayout: False(s)
    autohint: True(w)
    globaladvance: True(s)
    file: "/usr/share/fonts/noto/NotoSans-Regular.ttf"(s)
    index: 0(i)(w)
    outline: True(s)
    scalable: True(s)
    dpi: 75(f)(s)
    rgba: 1(i)(w)
    scale: 1(f)(s)
    charset: /* tl;dr */
    lang:  /* tl;dr */
    fontversion: 132055(i)(s)
    capability: "otlayout:DFLT otlayout:cyrl otlayout:grek otlayout:latn"(w)
    fontformat: "TrueType"(s)
    embeddedbitmap: True(s)
    decorative: False(s)
    lcdfilter: 1(i)(w)
    namelang: "en"(s)
    prgname: "fc-match"(s)
    postscriptname: "NotoSans-Regular"(s)
    color: False(s)
    symbol: False(s)
    variable: False(s)
    fonthashint: True(s)
    order: 0(i)(s)
    namedinstance: False(s)
    fontwrapper: "SFNT"(s)