I have been using CCR1009 -7G since almost 4 years , but last year I have noticed that the router takes time to boot up after restart (4¬6 minutes to boot) , sometimes doesn’t distribute IPs till I do anther restart .
First check logs to see if there’s anything suspicious (a long gap between log entries might indicate something wonky going on).
Hook a serial console to your CCR and observe if there’s anything shown there while boot lag is going on.
I suggest you to backup everything (licence, ssh keys, cert, settings, files, etc.) and do a clean 6.48.6 netinstall,
then configure back the device with the file .rsc (not .backup)