REPRODUCIBILITY (% or how often): 100%
BUILD ID = OS VERSION (Settings > About product): 220.127.116.11
HARDWARE (XA2, Xperia 10…): Xperia 10 Dual SIM
UI LANGUAGE: German
REGRESSION: (compared to previous public release: Yes, No, ?): ?
Some characters of Old Bulgarian aren’t displayed in your browser.
A connection to the Internet.
STEPS TO REPRODUCE:
All characters are displayed.
Some characters, such as “ꙁ” in “ѩꙁꙑкъ”, are displayed as black boxes.
Firefox, which shares the same engine, displays all characters at least on macOS. I haven’t tested recently on other OS-es, desktop or mobile.