Sprites are missing in GZDoom when using OpenGL acceleration with the latest graphic card driver 18.7.1. Apparently this has been an issue before with past driver versions but I can't find a fix short of rolling back to a previous driver version.
I would report this to AMD as a driver bug the won't see your report here. I have seen this many times to where it was fixed once and then broken again. The link to report: AMD Issue Reporting Form