If Kermit uses his white skill (Rainbow Connection) to duplicate buffs on others allies, it successfully copies the “Precise” buff from Robin Hood red skill (Sure Shot). This is working as intended.
The problem is:
When Rainbow Connection expires, it not only removes the copied buff as supposed to, but also the initial source of the buff, Robin Hood Sure Shot.
So you are left with a Robin Hood who stops having his “Precise” buff that is supposed to be always active because of an allied Kermit.