Entering the nether fortress does not grant you the "A terrible fortress" advancement

[ElLiox]

Describe the Bug

First of all, sorry for my bad english.
Entering the nether fortress does not grant you the "A terrible fortress" advancement

Reproduction Steps

1. Open a Minecraft world using [Bygone Fortress v1.0.0 [1.16.5] (Forge)] and bygonenether-1.3.2-1.16.5
2. Locate a Bygone Fortress's nether fortress
3. Position yourself anywhere in the fortress
4. No advancement is granted to you

Expected Result

It should be granted to you, either the old Bygone Nether fortress advacement or the Minecraft vanilla fortress advancement
(The ideal would be for you to be granted the Minecraft vanilla advancement, since otherwise it would remain as an unobtainable advancement)

Screenshots and Videos

No response

Crash Report or Log

No response

Operating System

Windows 10

Mod Version

1.0.0

Minecraft Version

1.16.5

Mod Loader

Forge

Mod Loader Version

36.2.41

Other Mods

none

Additional Context

No response