I've been developing a server, and never have I seen this happen.
The server is for 1.12.2 Spigot, using via version to support the older version. [1.8x]
Essentially, the sun (daylight cycle) on the server world (there's only a single world) get to the point of dusk.
I'd say practically the center of the dusk/dawn cycle.
As soon as the sun hits dusk, it RESETS to noon. This prevents night from occurring.
Is there an easy fix for this? Do I need to allocate more ram to my server?
Any ideas would be appreciated.