Battery continues to drain when wireless charging
I have a fast charge enabled wireless charger at home that I have no issues with at all.
My coworker gave me his wireless charger because he didn't need it anymore. I have gotten the wireless charger set up on my desk and now when I lay my iPhone X on this charger it starts to charge and then continuously stops charging and then starts charging again. After 20 minutes of not messing with my phone at all the battery has decreased by 2%.
I have changed bricks and cables and I still can't get it to charge correctly.
iPhone X, iOS 11.2.1