Windows 10, Google Chrome Version 81.0.4044.92 (Official Build) (64-bit) , Beta v1.103-beta.1-(ffbd638) (2020-04-08 20:25)
Confirmed. The names are missing on certain flags.
1. Open the research tree.
2. Scan through the chapters.
3. Notice the name of the chapter is missing on Fairies, Woodelves, Halflings, Constructs, and Embassies.