Lind took several months to recover when he could have done it in days previously. Qing and the rest lectured him heavily but Lis and Little Fox had begged for them to forgive him and it was hard to stay angry with those 2 begging.
Delenn confirmed his shard was on the cusp of breaking through as well so he cultivated once he was safe to do so. He needed to be in peak condition when he attempted it as he now was warned he had nearly faced it in his rush to heal everyone.
She was unsure how he changed it but it was entirely possible he had depleted himself so badly he could no longer advance!
He could have suffered severe Qi deviation at best or death at worst!
Haro had recovered enough to talk but he was severely depleted once more. Thankfully, he recovered far more quickly in the Celestial Fields.