Level Instance - Baked light lost on duplicates

Hello,

We have difficulty in reusing level instances with baked light. When level instance is duplicated, new one pops message that light needs to be rebuilt.

Purpose is procedurally generated dungeon for mobile graphics, each tile (dungeon segment) has geometry and static point lights in it. Normally, we need to bake once, and reuse the LI module frequently throughout the level.

Anybody knows how to achieve a proper behavior? I tried different ways of baking, including/excluding point light from the LI, nothing seems to help.