TL;DR at the bottom:)
This is going to sound terrible, but I wouldn't know the solution. I am too disorganised to keep devlogs or anything of the sort and have bad memory so I am afraid I can't help you LOL.
What I do know is I playtest stuff and have playtesters too. I think my lead playtester did say that the hints for that puzzle you are talking about are a bit vague... but I must have ignored him LOL sorry not much help.
Unfortunately not enough people play my games to make walkthroughs and I am too lazy to make them myself.
TL;DR
Sorry, I forgot LOL.