Can't add conhost, cmd, mobsync into Avast's firewall -> rules missing

Hello,
When I tried to add these applications into avast’s firewall, as soon as I closed the firewall window and re-opened it, these rules were missing. I have tried again and again for several times but they kept disappearing

Everything other than those apps are fine

For conhost.exe, it doesn’t even appear when I was trying to add it inside C:\windows\system32, although it’s not hidden or blocked or anything. I can easily navigate to the process using Windows Explorer

I sent a support request using avast help inside the application
I did send another request in the past (weeks ago) but I’ve never got a reply

OS: Windows 8.1 Pro
Version: avast internet security 18.1.2326

Reported it for you. :slight_smile: