Looks like a bunch of nodes tightly packed. If curious, could try to grow it out and see if it ever stretches out a bit, but in my experience this is a waste of space.
Try to let a few dominant branchs remain and remove some inbetween to space it out a bit. Less intense light will help it spread out too.
looks like it's quite a bit slower than others and some funky leaves. replace it if you can or grow others out a tad more+lst to compensate loss would be my suggestion.