Then either there's a contradiction in Erika's red truth, the locked room from the inside applies only until Erika turns her back allowing an escape, or hands passing the threshold.
And yes, there may be precedent for contradiction in Erika's red truth.
" "So I dashed all over the mansion, visited all the crime scenes, and......I re-killed all of them."
...
She completely severed the heads of all those she killed.
...
All five people I killed.......were very much alive until the moment I killed them.
... "
And yet, earlier in the tale...
• At the time of the deconstruction of the closed rooms, none existed within the rooms except the VICTIMS (Natsuhi, Eva, Kyrie, Rosa, Maria, Battler)
• No murder was committed after the deconstruction of the closed ROOMS.