Tests are not running in parallel, after adding attributes(tags) of Report portal api

[shaifaliyadav]

m running tests in parallel using -parallel attribute. And am using report portal https://github.com/reportportal/agent-js-mocha to publish the results.
Tests were running in parallel until i used this addattributes (tag ) feature of report portal. Example:

const PublicReportingAPI = require('@reportportal/agent-js-mocha/lib/publicReportingAPI');
...
describe('suite',()=>{
before(function (){
PublicReportingAPI.addAttributes([{ key: 'suiteAttr1Key', value: 'suiteAttr1Value' }, { value: 'suiteAttr2' }]);
});
it('test', () => {
PublicReportingAPI.addAttributes([{ key: 'testAttr1Key', value: 'testAttr1Value' }]);
PublicReportingAPI.addAttributes([{ value: 'testAttr2' }]);
});
});

now if i use this PublicReportingAPI.addAttributes([{ value: 'testAttr2' }]);, then tests don't tun in parallel mode and if i remove this, tests run in parallel mode.