Updating to the latest version resolved the issue; I hadn't noticed that there was a new core update available.
Thanks!

I am running version 10.0.1.18
I have run the full library update as instructed and the ClearDispaly() macro is still not working. I have also corrected the transparency issue.
This is the output I get when I run the code.

Here is the project file that demonstrates the problem.
Thanks.

I have attempted to use the ClearDisplay() macro on the following displays and found that it does not clear the display in the simulation.
*ssd1306_i2c
*ili9488_SPI
*ILI9341_SPI

I am using Flowcode V10.