Watch-Restart doesn't serve updated code always

[bvedam]

I use pm2 0.9.6 on ubuntu, for managing my node application and am seeing an issue with Watch-Restart. I am using app json declaration
cluster instances: 1
watch: ['.']
ignoreWatch: [some other folders]

On pm2 start, lsof command shows 1 parent process and 3 child processes. If I remove watch & ignoreWatch, it shows only 1 child process indicating the other 2 children are for watch and ignoreWatch.

On file change, "watch" works but the change is not reflected consistently indicating the "watch/ignoreWatch" processes also service requests but with old code (as they are not restarted, PIDs remain the same).The change is reflected only when the "actual" service (with a new PID) meant for serving serves the requests, as it is the only one that gets restarted.

"pm2 reload all" doesn't fix it either, as the helper processes remain. I have to do pm2 kill and start everything over to get it working again. Appreciate your help in fixing this.