No problem.
Be sure to keep an eye on it.
Can be many things, damage from the shell opening process, the mentioned waterdrop, ph or ec stress, light stress.
Also when growing the same side by side, not being uniform is quite normal, it is caused by the different genotypes that come with a strain.
Dont worry bro, learn step by step, the weed grows itsself, we just try to take extra care of it.