I recently purchased the light speed 5 relic rebel token and it did not upgrade all my skills to level 7. I used it on my saw gerrera character and he did get the boost to 5 tier relic, my leader ski...
Ideas
They don't go to level 7 if level 7 is an omicron or zeta. Not very intuitive (i.e. a lot of people have made this mistake/assumption). However, if you scroll through the conditions, it's stated.
I must have missed the part where it said zeta then. In that case tho when I went to use the token on my character in the box where it tells you what skills would be upgraded it highlighted that the leader skill would go from 6 to 7. Then that's the bug lol