What is going on here: When I apply a fill color to a "(Group)" layer containing a "(Pixel)" layer then …
• the pixel image entirely disappears + gets replaced by plain color
• its initial size gets set to spread size (even though there is only a left page).
• if scaled before then its new size caused by colorizing becomes even larger than the spread.
v192 pixel layer > grouped > fill color.m4v
Also odd: When I color a "(Group)" layer which contains an image layer then both layers, the group + the image layer, get the fill applied.
When I move the image layer out of the group then …
• the empty "(Group)" layer is indicated maintaining its fill applied. When I then move an image layer which has no fill applied into the group then …
• the "(Group)" layer still seems to have the color applied but doesn't display it in the page layout.