Thank you for your bug-report.
yes, I see the red Time-Line is in different location. it is bug. I will report to R&D.
Please you familiar with IT issue, so I am happy to explain how the light run in detail. forget it if it is too boring.
1, there is a server (cloud)
2, light communicate (sync) with the server every 1 minutes or every 15 min base on "what does change"
3, the app get the status of the light from the server and show the status in app.
4, they draw the curve and time line base on LOCAL data (what you saved ) in app.
The reason that wifi version is delay almost 1 year is the difficult of real-time with the server.
Tuya built the server base on the application of home-appliances. the concurrency is not good as bank server.
in other words, the data always lost or wait.
Now let us discuss "group", as you know, the difficult is which light's status should be show? of course, no light status technically. Maybe you say ”polling ", sorry, Tuya server not support.
so, when in group,
there is "push" data from app to server then to light.
there is no "get" data from the light to app.
consider WiFi is not a stable communicate way. ( lost signal always) . the sync is more conplex.
I have tested many "app-server-light" Network Architecture, they are all same problem. (for example. red sea, echo tech )
Anyway, there may 2 type of bugs
1, the status of the light is a little different with the show of "single device" in app
2, the status of on light is a little different with the show of "group"
Solve it :
1, do nothing, just wait 15 or 20 minutes. they will sync again.
2, re-power-on the light to focus sync.