where the Precision takes effect？

In client.Point, there are two places where Precision can be entered. Why does the Precision I enter in it not take effect and does not affect the http request at all, so what is the use of it?

Start at the client.Point entry point and trace how its Precision value is handled when the HTTP request is built. Compare the two places where Precision can be entered and verify whether either value reaches the request; done means the behavior is explained and, if unintended, covered by an appropriate test.

Written by the indexing model from the issue text.