Enemy Mobs sometimes spawn during the daytime (Probably only in hard mode), Zombies and skeleton still burn but they still should not spawn in the daytime. They might also have a chance of spawning Zombies inside houses (With Bright Light Sources). Many villagers were killed in my Minecraft house because of Zombies, Skeletons, Witches, Creepers, and Baby Zombies spawning inside of it.

The Videos are to large to put in the attachments so here is links instead.

Here is my proof: 

https://drive.google.com/file/d/1mM4xth2JmLAZE2BAvSdP1WnpcGHzDPwC/view?usp=sharing

https://drive.google.com/file/d/1mUGmitrNdgXyGkkmRccxI1uQ6iaHxSDH/view?usp=sharing

https://drive.google.com/file/d/1mUCIk6p_R6IGg-BRoN4LNrUyUik6KM-2/view?usp=sharing

I Hoped I helped!