Patchouli 1.15.2-1.2-28
Forge 31.1.25
No Optifine

Rarely (tried to reproduce about 10 times, only happened once) after tabbing out and tabbing back in with my custom book open, the strikethrough text goes to looking like normal text. Reloading the book and going to the entry again seems to fix it.

(excuse terrible pun [if you can even call it that])

This issue is stale because it has been open for a while with no activity. Please bump if this is still an issue, or this ticket will be closed soon.