Catalina, randomly crashes on login screen after sleep
I had this start happening the day following my upgrade to Catalina. For me it turns out that I had cron jobs piling up. I had 3 entries in my crontab for Magento from a project I worked on a couple years ago. Apparently cron has been deprecated for quite a while now and it seems that since I upgraded to Catalina, the cron jobs would not exit after running, causing the processes to pile up, consuming resources.
I solved my problem by deleting my crontab since I no longer needed these jobs to run. I used crontab -r to delete the crontab.