Verified on the same T14 Gen 1 with Samsung NVME, not reproduced.
BIOS version 19W.

Could you update BIOS:
https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-t-series-laptops/thinkpad-t14-type-20s0-20s1/downloads/DS544549

After updated BIOS, please set BIOS -> optimized = Enabled then load default 
setting.
After reboot change config -> power -> sleep = Linux.

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https://bugs.launchpad.net/bugs/1889306

Title:
  Resuming from deep suspend on Thinkpad T14 crashes system (readonly
  filesystem)

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