How to prevent host unmuting me automatically without me physically clicking it myself?

Hello, 

This is a question as a meeting participant. 

Until very recently at the beginning of each meeting I would receive a permission box asking if I would like the host to be able to automatically unmute me during the meeting. I would select No and so each and every time the host wanted to unmute me I would need to physically unmute myself -  even within the same meeting. This is a necessary feature in our circumstances. 

However I no longer get a permission box come up on log in and the host is able to unmute me themselves. 

I have the setting to 'Request permission to unmute'  in the "In Meeting (Advanced)' tab turned on, but it doesn't seem to address this issue. 

Where do I find the setting to put it back as it was so that hosts need me to physically unmute myself every time?

Thank you