Beginner Gardening: Ailing fiddle leaf fig... please help!, 3 by Eonj27

Eonj27 wrote:
I recently purchased a fiddle leaf fig tree - it's actually two "trees" in one pot. Tree #1 is quite healthy - perky leaves, seems to have adapted to its new home well, and about 4" tall. The other tree, tree #2, was doing fine at first but is now not faring so well, sadly. It's slightly small than the other tree - about 3" - and its leaves have begun to droop considerably. The green branches holding the leaves are becoming soft to the touch and beginning to bend with the strain of the heavy, drooping leaves. In the attached photos you can see the healthy tree #1 on the left side and unhealthy tree #2 on the right.

I'm not sure what I'm doing wrong here since tree #1 is so healthy, while tree #2 is ailing in the same exact pot. I've been extremely careful not to overwater... and if I was overwatering wouldn't both plants be exhibiting the same symptoms? I also think the trees get decent light as the pot is positioned near two large south-facing windows. When I purchased in January I also repotted into a larger pot.

I'm fearful that tree #2 is on the verge of death... any thoughts or help would be deeply appreciated.