For me the same.
I never was able to enter this bunker (PS5,too).
Instant crash after passing the door.
Tried it after the Landfall-Update yesterday again with a friend in coop. My game crashed, for him it now worked. (he had the problem before, too)
Reinstalled the game today (again internal memory) and will try again today evening.
P. S. : these two posts should be moved to a thread in bugs-section.
Moved to relevant bug report.
//Mod
Unless Iâve misunderstood something, this bunker has been bugged for two years now?
A year and 3 months 
Still broken. Why even keep the bunker in the game if your not going to bother fixing it?
I have to wonder whatâs causing it. I thought it was the Ticks at first, because I never experienced any crashing whenever they werenât present. I was down there recently with the Ticks present and it still didnât crash, so I thought for sure it was fixed.
Apparently not 
Thought it was fixed, too. I never was able to enter it since one of the last two updates. From then on it worked for me (PS5).
I get what you are saying. I assume that they intend to fix it, therefore itâs still there. 