The Bug:
When enough time has passed after a raid has been started, the raid automatically ends with no indication of expiry.

Steps to Reproduce:

1. Give youself bad omen
2. Use /tick sprint 48000t to make the raid go faster
3. After enough time has passed, observe the bossbar

Observed Result:
The raid bossbar disappears automatically, with no indication of expiry.

Expected Result:
The raid bossbar should depict that the raid has expired.