I just updated to the new firmware and now my mavic platinum won't stay connected

Has anyone else had this problem and does anyone know how to solve it

Our apologies for the inconvenience. Did you receive an error message on the APP? May I know if the disconnected issue appears on a red or gray bar in the APP? Can you try to restore the factory settings and update the firmware using DJI Assistant 2? Kindly use this link to download the software: (https://www.dji.com/mavic-pro-platinum/info#downloads). Thanks for your support.

For me on my MPP, the .400 firmware seems to be fine.  The problem I had preventing flight was related to the Go4 app's more recent versions 4.2.20+.  I along with many others here are having severe issues 4.2.20+ from poor to no-existent video transmission to disconnects, etc. All seem to be related to bad coding.  In almost all cases, when folks have rolled back the Go4 app to 4.2.14 or 4.2.16, all issues cleared and appropriate use was restored.