unstable (bi-modal) render durations

**Describe the bug**
I have observed that in the recent versions of React/React Native render durations seem to cluster around 2 values. The expected behavior would be to cluster around single value (i.e. the expected render duration).

Example results:
> Mean: 78.2 ms
> Stdev: 23.3 ms (29.8%)
> Runs: 83.8 52.4 52.6 79.9 106.7 105.2 56.4 53.9 67.3 105.6 105.6 70.5 53.6 54.5 107.5 106.6 85.1 53.8 57.3 105.5
> Warmup runs: 105.0
> Removed outliers: (none)
Source: https://github.com/callstack/reassure/pull/584#issuecomment-4671619414

There is one cluster around 52ms and secodn around 105, with some results happening in-between.

**To Reproduce**
Run complex enough test (e.g. AsyncComponent from Reassures test-apps/native) under recent:
- React Test Renderer 19.1+
- React DOM 19.1
- Test Renderer 1.1 (which correponds to React 19.1)

The results should cluster around 2 separate values.

When running under React Test Renderer/React DOM 18.x or 19.0 or Test Renderer 1.0 the results cluster around single value.