getMergedBaselineHistory does not return all baselines reliably

Sometimes baselines in a stream are not visible.

I get all baselines of a component using below code:

IWorkspaceManager workspaceManager = SCMPlatform.getWorkspaceManager(getRepo());

IItemManager itemManager = getRepo().itemManager();

IBaseline baseline = null;

IBaselineSearchCriteria baselineCriteria = IBaselineSearchCriteria.FACTORY.newInstance();

baselineCriteria.setComponentRequired(component);

if (isPartialName) {

  baselineCriteria.setPartialName(baselineName);

}

else {

  baselineCriteria.setExactName(baselineName);

}

List<? extends IBaselineHandle> allBaselines = workspaceManager.findBaselines(baselineCriteria, Integer.MAX_VALUE, null);

I get the Baselines delivered into Stream using below code:

IHistoricBaselineIterator historicBaselineIter;

historicBaselineIter = componentContainer.getMergedBaselineHistory(component, Integer.MAX_VALUE, null);

List<? extends IBaselineHandle> baselinesInHistory = historicBaselineIter.getBaselines();

And using a search algorithm, I try to find if the baseline of specific partial name available in stream.
The problem, if the baseline is on top of stream, it is always found.
When there are baselines above the required baseline, code some times finds it and some times says baseline not found.

Is there some thing wrong in this code / approach?
How to handle this situation?