My L. repens and Brazilian pennywort have these lateral shoots.
I would take yours as a good sign your plants are growing! But, as Neilan said, they're completely ugly.
But, you know, nature has survived for this long so it must know what it's doing.
1 yoyo loach, 2 polkadot loaches, 6 cherry barbs, 2 turquoise rainbows, 1 chinese algae eater, 2 harlequin rasboras; java fern, java moss, hornwort, Asian ambulia