stem growth

[tlranger]

Found this while repoting, 1 of 20 all treated the same, stem 4x bigger, internode length and spacing all messed up:290694290695 ideas?? Have seen similar stem on giant varieties of veg and flowers.

[tlranger]

290756 stem size is translating into a bigger top, plants same except for strange stem plant on right stem is still 4x larger