Bug: Image Blocks
Two issues with Image Blocks were reported.
After uploading a transparent png image file to an image block (or selecting it from the library), the image block displayed a white solid background instead of the expected transparent background.
Image Blocks showed the blank image/upload icon after uploading an image when switching the Image Block layout from Poster or Inline to Card, Overlap, Collage, and Stack.
Both issues are now resolved.