Perplexed here. My ZZ plant has two top yellowing leaves on one of the stalks. It can’t be due to overwatering because I water once a month and it’s in terracotta with a fairly chunky mix. It’s in an east facing window room but about 6 feet away from the window. However, I did just repot it, into a bigger pot since the rhizomes were squished in there. The old and new soil was dry when it was transplanted and I didn’t water it till now, about ten days later (which is a total of about 24 days without water). Could this be repot stress? Or an old stalk?