Macbook Air 2020 - crashing during sleep with two external monitors (Viewsonic and Philips). Escalated to senior Apple tech support which ultimately, after lots of software maneuvers, concluded that it was a hardware problem and replaced motherboard. No improvement. Oddly, I recently had problems with Apple Mail indexing and replaced it with Outlook and have been several weeks without crash. Could Apple Mail have been the culprit? No other changes to configuration. Big Sur 11.7.1