Raiders can spawn in inappropriate places

They can also spawn in trees and get stuck- this is notable in the large oak trees where they spawn on top of a log and get stuck in the leaves

Still in 1.14 pre-3, 1.14 pre-4 and 1.14 pre-5

The same happens with the iron golems. It happened to me twice already that one spawned inside of the house, started taking damage and then glitched out through the wall. Another one spawned somewhere in the cave under the village that is partially on the hill and died in there. I might have a video of the first one. 

Still in 1.14.1 Release

Still in 1.14.2 Pre-Release 1 and 1.14.2 Pre-Release 2

Please check if that's still an issue for you in the latest 1.14 (pre-)release.

It seems fixed since the 1.14.4 release.