System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 1080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 431.36

Blender Version
Broken: version: 2.80 (sub 74), branch: master, commit date: 2019-07-11 13:50, hash: rB06312c6d2db8
Worked: (optional)

Short description of error
When trying to make highlighted text bold, the buttons on the font menu respond, but the highlighted text doesn't become bold and/or italicized. However, it does work when typing text with those buttons toggled. The same issue occurs with underline and small caps. I'll attach a test file and the fonts I used, and a screen cap showing the issue.

Exact steps for others to reproduce the error
Add a text object
Enter edit mode
Make sure the text fonts for each type are different like in the screenshot provided.
Highlight text using Shift+arrow keys
Toggle the Bold, Italics, Underline, and/or Small Caps in the Font menu