contrast changes

I am doing design photography with Canon R6mark2. I use an app for stop motion animation called Dragon Frame. With Dragon Frame, the issue of flicker due to aperture error is often brought up on the agenda, but that is not the case here.

The contrast changes depending on whether there is a strong highlight metal bar on the screen or not.This phenomenon does not appear in Jpeg, but it appears in the default state when raw data is opened in camera raw.

 Also, this phenomenon does not appear when using Canon's genuine development software.

Is this phenomenon a problem? Is it the specifications? Please let me know if there is a workaround.

Shooting environment

Mac os Catalina 10.15.7　　

Dragon frame 5(5.1.5)　　

canon R6 mark2+RF24-105 f4L

manual mode: WB3000k  ISO400  f16  1/12sec  raw+jpeg

camera raw　15.4.1

Not used [auto lighting optimizer][digital lens optimizer]

Attachment

[A] has a metal rod.  [B] is without metal rod.

There is a difference in the histogram with camera raw open.