I haven't heard any similar bug reported on the bot, does it just happen with the CG bot or any bot?
I don't know what to advise but, especially if it happens with multiple bots, the general advice would be restarting your PC, disable any plugins which might interfere, or any 3rd party software which might interfere (antivirus, VPN, etc). Reinstalling Runemate could fix it. But really these are kind of all guesses.