107 Votes in Poll
Your house probably isn't bright enough to prevent hostile mob spawns. And what "recent update" are you referring to? Do you mean snapshots?
I have a well lit basement, but they spawn anyway.
The update was today.
Edit: The update is 1.13.0 (Bedrock)
How lit up is your basement.
Lit as a Christmas tree, but I found a hole in the wall. Hopefully, fixing that will fix my pest problems.
I think the problem is lightiling. Monsters spawn on lighting level 7. Just light your house