EOS R6 Mark II - Delay Starting Up

[JCin]

Hello, I have two R6 MKIIs winch I believe have identical custom settings that I use to shoot events. Lately, one of these cameras takes more than 30 seconds or so to turn on. This only happens when I put a new battery in. Once it dose come on, everything seems fine. If I turn it off and on again, it comes on right away but if I put a new battery in it delays starting up. In comparison, my other R6 MKII turns on almost instantly every time. 

I've tried different batteries of course, attached different lenses and took out the memory cards.

Have an event next week and concerned it might not turn on at all one of these times. Anyone have an idea of why this is happening?

[Peter · Accepted solution]

There was a Bluetooth bug with R6 II that slowed down the power up. Do you have the latest firmware installed?

If that doesn't help you should call Canon.

[JCin · Accepted solution]

Thanks so much! So I thought I had identical settings on both cameras. Your reply helped me to realize that I had the Bluetooth and WiFi settings enabled on that camera. Had them on to share directly from my iPhone and forgot I did this. I disabled them. Starts up like normal now.