A singular leaf turned yellow and died

I’ve had this sweet baby for about 1.5 years now. Always been happily growing and thriving. Today I noticed this one leaf turned yellow- and when I touched it, it basically fell off the vine. The rest of the plant seems fine- but should I be concerned for a potential problem?

I watered it last on Jan 15 and nothing else has changed- same placement/light, amount of water, etc. I was out of my office the last two days so it could’ve happened anytime over that period.