Describe the bug
Exemplars from TraceQL metrics are not homogeneously distributed across the series but instead cluster towards the right/left side, leading to potential biases in analysis.

Exemplars sometimes appear on the left side and other times on the right, meaning the sampling decision directly impacts their distribution

Showing all the series:

To Reproduce

1. Run a TraceQL metrics query that returns many series with exemplars
2. Check the exemplars distribution

Expected behavior
Exemplars are distributed homogeneously