Issue Summary

Enabling or disabling Group by Objectives on Feature Roadmap that has a PI that contains over 200 features causes the roadmap to either load extremely slowly or crash.

This is reproducible on Data Center: Yes

Steps to Reproduce

1. Go to roadmaps, select Features (Jira Epics) and a PI with over 200 features.
2. Go to View Configuration, Other Options, and either enable or disable Group By, select Objectives.
3. Hit Apply

Expected Results

Roadmap reloads in timely fashion.

Actual Results

Tab crashes or Roadmap does load but only after extreme length of time.

The below exception is thrown in the Browser console:

bundle.es5.min.js:2 [Violation] 'load' handler took 175533ms
[Violation] Forced reflow while executing JavaScript took 483ms

HAR shows Error 500 on https://<SITENAME>.jiraalign.com/privateapi/roadmaps/features?ReleaseType=ran_ids&ViewByPrimaryProgramOn=false&IsUnassigned=0&IncludeStandaloneFeatures=&SkipNumber=25&TakeNumber=25&IsObjectivesOn=false&MonthByQuarter=false&IsGroupByOn=true&GroupByProperyValue=objectives

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available