Editor Crash Exiting playmode if render settings changed realtime

Hi, I creating big project and now suddenly it started to crash whole editor while exiting playmode. Maybe it's because new update. By way of reduction I managed that crash is caused by updating some render settings in realtime, namely

RenderSettings.ambientLight RenderSettings.ambientEquatorColor RenderSettings.ambientGroundColor

Crashes if hanging any of them.

And weird, crashes also when I update my directional light (I tested every variable described)

Now I'm 100% sure, just do something like moonLight.intensity = Time.time; And unity crash when exiting playmode. Really annoying and making work really painful! :/

Edit: After update to 5.3 it seems to be fixed, but there are new bugs, I will create new topic.