SSM Agency Amazon running CPU high load near 100%

I just started a t3a.nano instance it's normal at stat up but it's not stable later. The ssm agent service ran as cron and made my server crashed almost. Right now I can not connect to SSH.

I have tried Stop and Start also, nothing help to solve it up to now. Anyone meet this issue?

P/s: I have tried read old topic and wait 1-2 hours to ssm update but no change. For AWS Support you can check my instance i-0d8bcd6234b2d9ac6