@Garthox I faced the similar issue with my VIGI C340 camera. More than 12 hours it will be working the next day it will be offline. if you reboot the switch it will again start to work for another half day or more. Later I found that it is due to cat 6 cable installation. Please check your cable connection with Network cable tester. during RJ45 crimping 3 out of 8 twisted cables were not connected properly in my case. The camera was powered ON all the day(verified from SD card recordings on camera) but communication between SWITCH & camera failed frequently. 

  @dubecell Thanks,

Ill give that a check.

I didn't mention in the first post, but I did get a cable tester to do those checks.

What I did have on 2 cables was the tested showed all good, but on the switch when the lights flashed, there was one flash that was almost like a short where it barely lit up.

I re-did that connection and it was good for a while.

I hope your setup is all good now, but I am glad to hear I am not the only one with a similar issue that was rectified.

I can see myself redoing these connections/crimps, thanks for confirming. Maybe I had slight issues while doing them.

Edit: spelling

  @Garthox All my connections are stable now. After doing cable crimping/testing make DHCP IP reservation in your router even though you maintain a static IP in cameras. So that no static IP will be wrongly assigned to any other devices during DHCP requests.

  @Garthox 

Responding here with an update in case someone has a similar issue.

I was about to remove and re-crimp the connections, but I started with the new batch of cables that seemed to not work at all.

When I was to cut them, i noticed the orientation was incorrect and some reading online showed that on short runs of network cable it does not matter, but longer runs there is interference within the cable from the pairs.

I re-crimped all of these;

OrangeWhite // Orange // GreenWhite // Blue // BlueWhite // Green // BrownWhite // Brown

Re-tested with the cable tester then on the camera and this picked up.

Now showing on the mobile app and been stable for the last 2 hrs now.

Hopefully all is now good, but Ill report back should there be a need.