ScummVM: 2.5.1 and nightly 5aef420c (no difference)
OS: Linux Mint (like Ubuntu)
I've been playing “The Blackwell Epiphany” in ScummVM (because I had hit a game-breaking bug in the official GOG Linux executable, the Windows release has an update that hasn't made it to Linux, and I'd rather play it on Linux by any means possible than reboot into Windows to use the official executable there). So far it's been completely playable (though I haven't yet caught up to where the game broke last time), but there is at least one bug I've encountered.
In some scenes, particularly the navigation screen and in certain zoom-in moments like when you look at each of the photos on Rosa's wall or the computer on Emil's desk, subtitles are covered in whole or in part. In the navigation screen, the subs are behind the location icons; in the others, they're generally entirely hidden. I suspect (but cannot confirm) that these are one bug.
Interestingly, there is at least one zoom-in moment where this bug does not occur: When you look at the corkboard in the police station, Joey's subtitle is visible as it should be.
Dialogue audio plays as expected; this only affects subtitles.