I have four Rokus in total at home. The two most often used updated to 10.0.0 4209 and since then SRT subtitles are not showing with files from home media servers (tried several, from MiniDLNA on Linux to Emby on Windows).
Two are seldom used and have not updated yet, they have 10.0.0 4195 and show the SRT subtitles correctly.
Can someone please fix whatever they broke in the latest firmware upgrade?