Yellow leaves on my cuttings ?????

[bigweed55]

Hello all.
So all my clones i cut 3/4 days ago seemed fine until today. I didn't use any rooting solution, i simple cut at a angle and placed in pre-soaked cubes inside a heated propagator under led lights for 24 hours a day. Some of the leaves on a about 4 have turned yellow almost white and i don't know why. Haven't looked online yet but thought i'd post here first. Anyone any idea's i'd appreciate it thanks.

[TheHouseCoatguy]

high there
they have no roots so clones used stored nuits in leaves.the amoubt of water in cubes is very important.yellowing leaves is common.if they arent dieing leave them alone.yellow leaves and all .once roots are established the new growth should be nice .high humidity is important but mold likes high humidty also.thats why rockwool is so liked for cloning because its sterial..but getting their ph stable is a bitch.
hope this helps