DevOps Test Plans - "requests are being delayed" when using "show test points from child suites"

Hi All

Maybe someone has already faced this issue

One of our TestPlans currently has over 5500 test cases/testpoints. (query based test suites)

Whenever one of the testers clicks on "show test points from child suites" option, their "rate limit" consumption skyrockets to 500-ish (limit is 200) & they are completely blocked.

Anyone knows if it's "just" because of the high number of test cases or there might be another reason why this is happening? 

Thanks in advance

BR
Barna