@Sybertiger - I had huge problems with my T5442TM-AS also. Probably a little more severe as not only would the camera act like yours, but it would also cause other cameras to disconnect from the network on an irregular basis.
Here is what resolved all my problems with this: Note this is the firmware I used (V2.800.0000000.10.R, Build Date: 2019-11-18 )
1) Before applying any firmware, factory reset the camera via the web interface of the camera itself. Forget about using the Config Tool, connect directly to the camer via a web browser.
2) Apply whatever firmware you want to use, and reboot the camera. Do all this by only connecting directly to the camera, via a web browser.
3) After it reboots, do another factory default reset, and let it reboot again.
After I did all this, no more issues with the camera.