What I'm finding is if your main leading plant dies, then the plant will lose apical dominance, and almost always, multiple plants will be formed because the energy gets dispersed to various points throughout the plant. It is similar to pruning a bush where the plant will develop side branches if the main point is cut off. Your plant must of had it's leader cut off.
Here are a couple of my main plants with apical dominance vs the ones which have been divided which will almost always form multiple plants which will share the energy from the original rhizome.
This is making a couple of small babies off the older leaves, but it shouldn't suck out too much energy from the main plant, and I will eventually take those off once they have their own roots.
This is the top part of a division which had a small root, and it seems to be picking right back up likely to get back in size quickly.
Here's the main bottom part of that same plant. As shown, it is producing 4-5 new growth points, and will look just like your plant in another 4 weeks or so. I believe this is exactly what happened to your plant, but I did this on purpose.
As shown here, a piece of plant that does not have apical dominance will produce multiple growth points. You can eliminate some of them if you want the energy to go into fewer plants, but I like to watch and observe.
This piece is a couple weeks more advanced.