This plant split into two shoot apical meristems at 3rd node, I think? Is this due to stress, or a plant morphology/mutation? Pic 1 = weeks before pic 2. Pic 2 = 3rd node & 2 stems. Pic 3 = strain name.
That's happened to me a few times and think it's mostly mutations. One or 2 may have been a tiny bug.
Luckily the timing seems to be good and it's probably done you a favor.
Looks genetical if you ask me, probably a mutation.
I would keep that plant & even try to make a clone, as mutants can be interesting plants.
Happy growing!