With the project attached to Case 1108597, the player character collides with various colliders in Unity 2019.3.0b3, which doesn’t occur in Unity 2018.4.
I’ve attached a video to bug-report 1184164, which shows the player is able to walk under the ceiling lamp (chandelier) in 2018.4, but is stuck in 2019.3 and bounces back and forth at this position.
The player object uses a “Character Controller” Component and it seems to somehow collide with the “Mesh Collider” of the chandelier in 2019.3.0b3.