Dims by itself!?

First of all. Am new here and this is my first post. Hope you are all well~
So I have this YLXD50YL ceiling light installed and connected to the Yeelight app. I also have it connected to the remote.
The issue I am having is that it dims itself from time to time. I had to use the remote to un-dim it. I have tried factory reset the ceiling light but it doesn’t solve the problem. I am all ears to anyone who have any suggestions.
Thank you in advance