Emails no longer rendering correctly in dark mode (platform update?)

I was wondering if anyone is aware of any updates on how email platforms render images in dark mode.

It has come to our attention that our emails are now displaying issues in dark mode where they weren't before when we tested them on email on acid. These emails already exist on Klaviyo and were working fine until recently.

Up to now, we would put a white background image behind blocks in Figma to allow the block to display correctly in dark mode. It would appear this is no longer working.

Is anyone aware of any updates? Do you have any suggestions on how to counter this?

Best,

Dean