Flashing Briefly Within an iframe

Hello! I am someone who creates websites.

When I click a link within an iframe, the screen briefly turns white. (This link navigates within the iframe, and the parent frame does not navigate.)

I haven't specified any background-color or styling within the iframe, including the body. However, it turns briefly white during the transition, probably due to a rendering issue.

This issue doesn't occur on other devices (android). Can this be resolved with CSS, or is it a bug?

PC MAC OS / 13.4 (22F66) Safari / 16.5 (18615.2.9.11.4)

iPhone IOS / 16.1.1 Safari / unknown