Different entity values on charts depending on used entities

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Hi everbody,

I have an issue with one of my entities.
Dependent on what entities I look at in that charts, the value of a specific entity changes.

I have a Shelly 3EM Pro and measure my grid consumption or return (from solar) with that Shelly.
It’s more about the “total” value measurement that seem to have that issue.

Screenshot_20250320_223749_Home Assistant
Screenshot_20250320_223749_Home Assistant1080×1034 122 KB

Screenshot_20250320_223721_Home Assistant
Screenshot_20250320_223721_Home Assistant1080×1040 96.4 KB

Screenshot_20250320_223709_Home Assistant
Screenshot_20250320_223709_Home Assistant1080×1026 130 KB

The Problem with that is, I think that the Energy Dashboard might be showing the wrong overall self-consumption (just one example).

Does someone has an idea why that issue occures?
What is the best method to investigate that further?

Thanks!
BR
Thomas