.... question is, if the node count is close to what the other plant was at this time/age ....
I'd ask the same question as Waira --
As far as overall growth goes, I'm more interested in node count that pure height.
If she's got about the same number of nodes, then it's fine.
And just some other reason, e.g. humidity, light levels, that's causing her to remain tight.
But, seriously, this plant shouldn't be in the "Infirmary"!!

She's fine. Leave an empty bed for some poor plant (and grower) that needs it, haha!!!