Actually i got reply from the support

Currently installing a debug tapo trial ap and should send the log the next time the issue occurs - which will be tomorrow . The app mirrors the normal tapo app and once you put your username and passowrd you can monitor the same way as the normal app

If someone is interested this is the link https://static.tp-link.com/upload/beta/2024/202412/20241220/Tapo_3.8.115(4615)_20241217143116-tapo-trial-dist-release.apk

The attached file below also sent as an attachment

1. Use Tapo Trial App to try to reproduce the problem. In your case, visit different pages on the energy monitoring section, and also reload the pages.

2. After the problem is reproduced, go to APP> Me>About, and click the Tapo icon 10 times on the About page (if it requests storage permission, please agree, so that the log can be saved to local storage on the phone), and the log will be imported to the mobile phone directory-TPLINK folder.

If there are more logs, time It will take a long time, please wait for the end of Loading.

3. Click the Share button to send us the files. 

  @MartinMihov it's just to send logs or contains a fix to test?

I don't understand TP-Link approach to issues. Why don't they just make a diff between latest and previous version of the app? I bet no more than 10 lines of code have changed

  @4L3xN3t 

I dont think It ist App related. The device sends the Data to TP Link Servers and the App ist Just needed for visualization. I did Not Open the App in days when this Situation occurs. I can however See the device stats beinf resetted without opening the App (from within Home Assistent) so in my opinion there IS a Problem on the server side...

  @Nikomi well there is no reason to ask logs from a debug app if the issue is server side.

Anyway I just realized that the lost data from 5th and 6th of January have been recovered, but at the cost of the day after. Maybe they found something and are working on it

The data also recovered here the last days , but still resets each day - even today

tha debug app helps them to see where it broke as they have no idea , so more logs , more info , more chance for them to fix it

And i have this issue today as well. I'm missing data on my 1 P110 outlets(out of 3).
The problem has been going on since January 5th after updating the iOS version.

Some data recording of total and hourly consumption has been lost.

Also, the operating hours appeared reduced and do not correspond to reality.
I've sent a ticket also ...

All devices:
Tapo P110 

Hardware Version: V1.20

Firmware Version: 1.3.1 Build 240621 Rel. 162048

 I think this looks like a firmware update issue. I have 10 p110s installed, 8 of which have auto updated to firmware 1.3.1 Build 240621 all of these lost data yesterday (8/1/25) but seem to have reconnected today ok. The two others are still on firmware 1.2.3 Build 230425 (and are showing that they should be updated) yet these two have not missed a beat and collected data correctly 

  @Rich_J 

I am not sure about that. I have 4 Tapos P110 in total with all of them showing this issue. One of the however is still based on firmware 1.3.0. So, if it is firmware related, all firmwares beginning with 1.3x seem to be affected, I still think that they have a problem on the server side ...

cheers

  @Rich_J none of my plugs'firmware have been updated in the last months, so if the issue shows up now it has to have to do with something else

Happens to my P115 as well. 
 

the issue seems to have started the 4 of January, and kept going for 4 days. On day 4 (7 January) I unplugged the P115 for 30 seconds, and replugged it. That seem to have stopped the issue for now, because the issue has not reoccurred. But the registritation/logging for the 4 days is still wrong in the app. 
 

additional info: my P115 has been online/powered continuously for months, probably 10 months or so. And when I removed it, and replugged it, the issue seems to have disappeared, as stated above.