R5 vs R6 start-up time

[Sadie1]

Hello - I’m not sure if a recent update changed the speed of the R5 (bringing camera to eye to shoot) or if it’s a setting change I did.     The R6 definitely responds much quicker.     
I will be walking with the camera and if I do not hit the shutter button as I bring the R5 to my eye - there is a delay like a black curtain before the camera realizes I want to focus.     It’s very annoying and causes missed shots.     I do not have this problem with the R6.     Both are set to back button focus.   Both cameras are up to date on software updates.  
Both cameras are set to Electronic 1st curtain

Any help you can provide will be greatly appreciated.    The R5 did not have this issue a year ago.    
Thank You 

[NatalyaP]

Greetings Sadie1,

We have not received reports of the start-up time changing with firmware updates for the EOS R5 camera. You may perform a low-level format or format the memory cards you're using with the camera to see if this helps with the issue you are having. Please note that formatting a card will erase all data from the card.

Another option is to reset the camera to factory default settings. You may click on the following link to view steps on how to perform this function:

https://cam.start.canon/en/C003/manual/html/UG-07_Set-up_0290.html

In case the issue persists, then you may send the EOS R5 camera to our facility for service.

Canon U.S.A., Inc. has created a new online repair portal that allows you to set up service in a few simple steps. The repair portal gives you the ability to set up service for multiple pieces of equipment at once, and to receive a repair estimate in the majority of cases, depending on your model and issue. The portal also allows you to upload images or videos that will assist us in repairing your product. You can also select how you wish to be notified of the progress of your repair. The portal's service history section allows you to view all services that have been performed on any of your camera or video products since January 7, 2020.

Please follow the link below to access our online repair portal to arrange for service:

https://mycanon.usa.canon.com/signin

Instructions for Accessing and Using the Online Repair Portal.

You will need to access or create your My Canon Account.

If you already have a My Canon Account and your product is already registered, simply click on the “Get Repair Services” link on the left menu and follow the onscreen instructions to arrange for service for your product.

If you have a My Canon Account and your product is not registered, you must register your product first. Click on the “Get Repair Services” link on the left menu, then click on the “Register Product” link on the right. After your product is registered, click on the “Get Repair Service” link on the left menu and follow the onscreen instructions to arrange for service for your product.

If you do not have a My Canon Account, you will need to create one. After you create your account, click on the “Add Product” link to register your first product. After your product is registered, click on the “Get Repair Service” link on the left menu and follow the onscreen instructions to arrange for service for your product.

Once you have completed the repair request, you will have an opportunity to print a copy of the request for your records. This request form will also contain shipping instructions and an address label that you will attach to the outside of your shipping box when mailing your equipment for repair.