As a patch-note enjoyer, I am compelled to say I have no idea what the note about puzzle 3 is referring to and it is making me doubt my sanity.
In v1.18, puzzle #3 had two visible listed words: "TH _ _ E" (in position 8) and " _ _ _ IS _" (in position 6). The blots in the latter are a bit of a red herring.
That must be a version I never downloaded. I'm wondering if you meant puzzle 5, in which case I would understand.
oops, lol. yeah, I meant #5.