Install the required optional matching your installation:
Arrival - Semitone
Dynamic Anomalies Overhaul - MrDemonized
Do NOT use both at the same time since they would overlap each other and are not the exact same. Load it after Arrival/DAO so the patch overwrites the default file.

Patch to hopefully prevent any dynamic anomalies spawned by these two addons from hindering the player while trying to speak to the Sin NPCs in the Hospital.

In case this still doesn't work, open the l11_hospital.ltx file using any sort of notepad, and change the following values

spawn_percent = 0.2 ---> spawn_percent = 0.0
anomaly_max_number = 2 ---> anomaly_max_number = 0
min_radius = 1 ---> min_radius = 0
max_radius = 1 ---> max_radius = 0

This will deactivate the anomalies spawn for this map and this map only. This solution is a failsafe for people who still want to enjoy Arrival OR DAO
while having the Re:Done Hospital addon active.