Hello everyone!
Until today I had the same problem with indirect lighting. Incorrect hard shadows were appearing on objects.
I have found that it is directly related to the distance object to the world’s coordinate origin. If you bake the scene at the origin 0,0,0 everything is correct, but if you move it approximately 50 meters, the lighting breaks.
This problem happens to me with version 5.3.2 as well as with 5.4.3 of the meta repository.