Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
activating native window placement on gnome-tweak-tool
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
I hit super. Observed bug.
   * What was the outcome of this action?
messed up fonts on title when hitting super and focusing on expanded window.
   * What outcome did you expect instead?
No messed up fonts

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It's the window border that highlights the focused window. It's layered
over the font, giving it the  "strike through" look.