What makes Mesh Renderers turn off during play Mode

Ran my game in editor to test and when it gets to point where it substantiates the player prefab it wasn’t there. Took me a while to figure out that the skinned mesh renderers where all unchecked for each part of player prefab ( because it was substantiated only existed in game). I never turned them off. So I pulled the prefab into my scene turned all the mesh renderers on again then hit apply. All was well and I ran it a few more times since then but then suddenly it happened again . this time I deleted the prefab and made a new one .Again fine for a few times then it just did it again. Am I missing something?

oh and just realized this last time the renderers where off in play mode but not on prefab when I just went to fix again.

Same problem no fix yet. Did you ever get this issue resolved?

2019 and I desperately need an answer for this, anyone got anything yet?