RE: UP2414Q won't reliably resume from sleep or reboot using mDP to DP cable
Even though you are running in boot camp, you are still using the apple proprietary hardware. We do not test/validate on apple hardware. The mbp does not have the standardized mDP (Mini DisplayPort). It uses the apple proprietary thunderbolt port. You should not be using a straight cable from the apple thunderbolt port. You need to purchase and test the thunderbolt to DP adapter. No, I have no idea where to get one.
apple thunderbolt port --> thunderbolt to DP adapter --> Dell DP to mDP cable --> UP2414Q mDP in port
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