XIAO, Reset doesn't work anymore!

Products & Technology XIAO
3

Hi,

  1. yes, other usb devices can be connected
  2. XIAO has stable temperature
  3. Yes, the green LED near GND
  4. It was a short time. Something may have happened after uploading the sketch. I read on the internet that connecting of 5V and GND shouldn’t harm microcontroller
  5. Yes, electricity comes from VCC, pins work

Previously, I had to reset XIAO before each new upload of a sketch, because Arduino IDE doesn’t see XIAO after new uploads and you need to reset XIAO before uploading. Now I can’t upload a sketch because reset stopped to work