On XPS 13 (2017) I watched this break due to a firmware update from Dell (something to do with sleep states)

Before the update: Windows sleep was strange, it would sleep but drain battery like crazy. Linux sleep was perfect, I could have the laptop sleeping for days.

After the update: Linux sleep started showing the exact problem as Windows now.

I did not dive much further because I switched jobs and got a ThinkPad at the new one which works perfect.