CR2 photos darker than jpg

[Tintype_18]

I downloaded 49 photos of an outdoor shoot today. After downloading, I sent them to the dedicated file and started to scroll through them. The CR2 photos would be light but after a couple of seconds would darken in comparison to the jpg photo. Never seen this before as both have been the same before today. Any ideas as to cause and the cure? As always, thanks.

[Tintype_18]

I have taken hundreds of photos with this T7 and this just popped up Friday night. As I said, this has never happened before. I'm going to check the settings, take a few photos and see if this happens again. Thanks.

[ebiggs1]

"I have both DPP4 and PSE 2021. I don't see that is the issue."

Use them!  Why use anything else if you have them?

[Tintype_18]

I have looked at the replies and appreciate all the responses. I'm still trying to interpret them to see what is causing the two problems that have never occurred before that last photo shoot.

[ebiggs1]

Why make problems you don't need. Use DPP4 or PSE.

[Tintype_18]

Still like to know what is causing these things. Why now after hundreds of photos? Never did it before. I was under the impression to shoot photos in a way to minimize editing.

[ebiggs1]

Every great photo you see and love gets post editing in some form or another. DPP4 or PSE is the place to start. 99 times out of 100 you will end up there anyway, so why not just start there? There is no point in trying to find issues you don't have.

[ebiggs1]

"CR2 does not darken as I had experienced. 

It's best to not search for problems that don't exist.

"The size differential between CR2 and jpg still exists but I can live with that. I checked several other photos with CR2 and jpg being the same size when viewed."

There should  be a size difference between the two. Raw files are not compressed but jpg is.  RAW file will be between two and six times larger than a JPEG file. RAW files are bigger because they contain more image data.

A JPEG image is has the data compressed down into a smaller file size.

[Tintype_18]

Update: Still having the RAW photo darken after a couple of seconds. The jpg isn't affected. Plus the jpg image is smaller, cutting off part of the photo as compared to the RAW photo. As I have said, this has never happened before with hundreds of photos. I checked settings on File Info and the only difference between two of three photos I sampled was the ISO.

[ebiggs1]

Are you using DPP4? 
Reset the camera to default. The camera and DDP4 won’t do that. Unless you set something up in the camera that is.

[ebiggs1]

BTW, if you are still using some other editor who knows what it might be doing. If that is the case you need to contact them about it.