@Mojole Exactly the same issue, all 4 cameras are offline. 1 of them has the latest update 1.2.24.
I'm starting to be extremely annoyed as I don't live at the house yet meaning I HAVE TO COMMUTE there for 45 minutes,
grab a ladder and climb to a 4-meter height to manually restart them.

The lack of any communication in this regard from Tapo is honestly outrageous.

For one, why can't I reboot the camera remotely? Connecting to it directly using it's own wifi & rebooting it from my phone? Meaning that I don't have to climb to the camera every single time it goes offline?

Why is no one communicating with us in this regard? It's clearly a firmware issue, cameras were working fine prior to the 1.2.23 update?
Why won't you rollback to 1.2.22 until you figure out the issue and fix it? How can I trust you with your product when you roll out such a utterly useless update rendering my property completely unsecured?

  @Nxi usually when these things happen, the new firmware is thrown in the trash and the latest stable is restarted, then thoroughly testing the changes added before releasing a new version. But the important thing would be to give users the chance to return to a stable situation. Why isn't this done?

  @__Fabio__ not getting thinnest all especially as users are complaining all over the world. 
need to check to return this  o customer approach at all. Sorry but not usable like this at all and really upset as I haven't also not got any response on the ticket I opened with TP

It's been 2 weeks since none of the 6 cameras have been offline. I modified the router to work on Channel 11 with a bandwidth of 20 Mhz. So far I haven't experienced any offline issues. Try it and see if it works in your case.

  @EGR76 bit awkward to set specific channel in my case, I have multiple access points around the house running all sorts of devices, cameras iot devices. The C425's are the only ones going offline.

I even set static IP addresses as was mentioned for the C425 but made no difference.

  @EGR76 Hopefully TP-Link can use some of our feedback to help solve this issue. I think you're right about the firmware, I've had one of my C425 for a while and the offline issue has been more recent.

Yesterday, I got the firmware upgrade for the oldest C425. I still have two more C425 cams running version 1.23.

I got the latest firmware update for both cameras, and it's better now, instead of going offline for half of the day, it goes a couple of times a day and each time 1~2 hours!

good improvement, you can make it!

Useless camera, with no support!

  @Mojole i still have 2 cams with the 1.23 and they have the issue. The one with the 1.24 seems working better but I got warning about battery drain...