Issues positioning lightmap baked game objects on a tracked plane in AR app

Having issues placing static objects on tracked planes in an AR app.

I am using Unity 2019.4.1f1 and ARCore.

Have created an AR experience, part of which requires the user to be able to place objects on a tracked plane at the point the user touches. Object placement works as expected if the they are not marked as static. However, after I mark the objects as static and bake lightmaps, the objects no longer position correctly and end up floating somewhere else in the scene.