We know "She Couldn't" leaked 11 years before it got officially released by Linkin Park in 2020 (mainly because it got leaked on an old 8-track demo dating back to 2000 that was discovered in 2009). Who knows, though, "Dialate", the Chester version of "Pictureboard", "Could Have Been", the Mark version of "Esaul", and the Chester version of "Stick N Move" didn't leak before they were released on October 9th, 2020 as a part of the HT20 boxset. It still could be possible for it to leak, though.