bring the geetar to a geetar tech and have them check on it. Tell them the problem you faced and see what they say and able to help
Treble bleed is not a syndrome nor problem. The world simply means "treble coming through"
In geetar context, usually it means a modification done, where a capacitor is solder across the vol pot to retain treble when turning down the volume.
Without having someone to check thru your guitar and identifing/knowing the actual problem(pickup related, amp related, setting related etc). Its ineffective to randomly find a term or mod(online) to try on the guitar and hopping it will work, without knowing whats the actual problem.