Dell Power Manager - Not working through WD19 Dock Station

My Setup: 

• Vostro5590. BIOS and drivers all updated via SupportAssist & Dell Update.
• Windows10Pro 64bit. All updates done.(2004) Build 10.0.19041.388.
• WD19(130W) Modular docking station. Not sure how to update firmware and if it's needed.

Without the dock, the Dell Power Manager is functioning correctly whereby, setting the charge-from 50% & charge-to 90% is observed via the battery status indicators on the taskbar or in the Dell Power Manager App. Normal power supply connector in-use for charging.

With the dock, the Dell Power Manager settings appears to have no effect. The result is that the battery status indicators remains "Fully Charged at 100%."  

Please advise.