UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.186 Safari/537.36

Steps to reproduce the problem:
1. have 2 tabs(twitch + instagram in my case)
2. mute both of them
3. then unmute by clickin on the icon
4. right click on the same tab that just unmuted and cant mute it back, insted it unmutes the other tab

What is the expected behavior?
mute the tab that i had just unmuted

What went wrong?
noithing to serius, would just like to se this fixed.
Also the mute function shoudl be enabled by default

Did this work before? N/A 

Chrome version: 64.0.3282.186  Channel: stable
OS Version: 10.0
Flash Version: Shockwave Flash 28.0 r0