pm2 is writing logs to rotated file, i.e, .log.1 file

I have the following logrotate configuration:

/var/log/app.*/*.log {
    su root root
    daily
    missingok
    notifempty
    create 0644 root root
    rotate 4
}

/var/log/app.*/*.log are the files where pm2 write logs. The problem is when the files are rotated pm2 starts writing to *.log.1 files. When rotated again it writes to *.log.2 files.

I've found two solutions,

1. use copytruncate in the logrotate configuration.

2. run pm2 reload ecosystem.config.js

My use case is such that I don't want to use copytruncate neither do I wanna reload pm2.

Any suggestions will be highly appreciated.