few things to try/check. I suspect 1 will work.
- Make a new material and make it a constant of .5 in the base colour and check 2 sided. If this fixes the lighting then its an issue with either the material you have applied or normals of your models.
- Make sure the lights are set to visible - true.
- If you have any blueprints referencing the point lights then double check that they aren’t switching them off when you begin play.
- try deleting all the point lights and dragging in a fresh point light (just 1) and see if that changes anything.
That’s it off the top of my head.
On the off chance that doesnt work, Are any of the materials in your scene quite complex? i.e. have a lot of textures all in one material?