Unexpected behaniour of the round component

When trying to round the length of these two -same length- curves, I get two different results. The length appears to be the same, even when using the vertices to calculate it manually. Could this be a bug and, if yes, any ideas on how to fix it?

Thank you in advance.

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    Eftihis Efthimiou

    I solved it by using an expression to round to decimals, as shown. It would be nice to have a way to read the actual values inside a battery, before they are rounded to six decimals!

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