EOS R6 Mark II shutter button triggers odd sound with EF lenses, RF OK

[Jenga]

Hi! First timer here!  I have an R6M2 and I use both RF and EF lenses.  I have the ring adapter. Some of my photography requires that I use the silent shutter.  I haven't had any issues with the EF lenses until this past weekend.  It makes an odd sound that i can't explain (electronic buzz/click maybe?) when I press the shutter button.  It's not the AF and I don't have IS on my lenses.  It is all 3 of my EF lenses so it's not the lens itself.  It takes the photo as normal. I've taken it off, put it back in, cleaned the contacts,  etc.  Everything i could think of. My RF lens is fine.  I'm kind of in a panic as I need this lens for a job this weekend.  I'm hoping someone here can help.  I have a video of the sound it's making but it doesn't look like I can upload it here. Gah. 

[kvbarkley]

Could it be IBIS? You should be able to turn that off in the menus.

[Jenga]

Nope lol. I tried that too.  It's happening with my 70-200, 50 and 24 EF lenses.  When I put my ear up to it, it's coming from the camera body for sure and when pressing shutter button.  I'm perplexed  

[kvbarkley]

Other than IBIS, there is nothing in the camera that can vibrate.

[Peter]

The aperture?

[Jenga]

It is not a vibration.  It is a sound when i press the shutter button and the shutter is on silent.  

[Jenga]

Nope. It only happens when i press the shutter button and it takes the photo...and it's only with my EF lenses on the adapter. 

[Jenga]

Here is a link to a video I took.  The sound is when i press shutter button.

https://drive.google.com/file/d/1jA1SODuNYF8d3yk3ntr8eK2K1BDHWO3s/view?usp=sharing

[Jenga]

Here is a link to a video I took. The sound is when i press shutter button.

https://drive.google.com/file/d/1jA1SODuNYF8d3yk3ntr8eK2K1BDHWO3s/view?usp=sharing 

[Jenga]

Here is a link to a video I took.  The sound is when i press shutter button.

https://drive.google.com/file/d/1jA1SODuNYF8d3yk3ntr8eK2K1BDHWO3s/view?usp=sharing