As per title - shows on train display, but not in HUD. (also needs stand up and sit down for SIFA to function correctly)
i can confirm this issue. Especially that you need to stand up and sit down again is annoying. I tend to forget this in the startup procedure, I always get an emergency brake application.
I can confirm that the Sifa doesn't show in HUD but the functionality is normal. You don't have to stand up or anything like that.
I can confirm this is an issue as I just bought HRR. I'm guessing this is linked to that emergency stop issue as well?