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I did some research and didn't find anything that said they drop their branches, so I would check its growing conditions with these below.

https://www.gardeningknowhow.com/houseplants/areca-palm/growing-areca-palm-indoors.htm

Make sure you aren't overwatering. They need moist but not saturated soil. They also are prone to root rot, which could result from overwatering. Also be sure it isn't being overfertilized. It needs bright, but indirect light.

If you think it is overwatered, you can replace the soil and repot it in a clean container. If you use the same container, clean it with a 1:10 bleach and water solution (1 part bleach to 10 parts water).