HY Sergey,
Still I am having the same issue. I ran the job with 10 days spinup period from 2020-06-20 to 2020-09-30, however on 2020/06/30 the model started to give the same bad value. Please see the attached image below. I have used CMAQv5.4.0.3. Any suggestion how to resolve this?
Thanks
Rasel