When trying to apply a filter in a Test repository with a large number of Tests, the Test Repository starts showing errors

Description
When trying to apply a filter in a Test Repository with a large number of Tests, the Test Repository starts showing errors.

Error:
Unexpected error has occurred (error occurred while searching for issues)

How to reproduce

1. With large number of Tests in Test repository. 
2. Use the filter option to filter by criteria (Assignee, for example)

Actual result/Attachments
Not possible to use Test Repository; start to print error messages.

The only way to use normally will be to remove the filter again.

Expected result
It should work as expected.