Cube View Connection Issue with Preserve Excel Format

Hello,

On version 8.5 (could be earlier, but didn't have a need to try) I am trying to create an embedded cube view that retains excel formatting. When I check mark the preserve excel format this works, BUT when I save the report, close it, and reopen it the cube view itself stays a light font vs black. Once I uncheck preserve excel format it reverts back to the expected black font cube view.....Is this a known issue or a way around it?