I've run Excel for years - macOS 10.15.7/Excel 2016 at the moment - and I"ve never seen anything like that. Same experience - never seen anything like that - have run Excel since 1987.
ryck
"What Were Once Vices Are Now Habits" The Doobie Brothers
iMac (Retina 5K, 27", 2020), 3.8 GHz 8 Core Intel Core i7, 8GB RAM, 2667 MHz DDR4
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Canon Pixma TR 8520 Printer
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