requirements jql function crashing the server

We recently updated xray to the latest version 1.12.3_j6 and JDK1.8.0_102, after that the "in requirements" function every time it gets used spikes the server CPU and leaves the instance unresponsive, the only message on the logs is "query too complex".

This is what we get on the logs:
2016-08-22 11:58:44,935 http-bio-8081-exec-14 ERROR l046857 714x23824x2 3imy25 10.28.12.216,127.0.0.1 /issues/ [issuenav.service.issuetable.DefaultIssueTableService] com.atlassian.jira.issue.search.ClauseTooComplexSearchException: A the following query was too complex to generate a query from: