Hello,
We experience several problems with the filters in Jira 6.3.1. When we open some filter the filter field is missing. Also we are not able to save a new filter.
The end points
/rest/api/2/filter/favourite?expand=subscriptions[-5:]&_=1533276806440
/rest/api/2/filter/29509?expand=subscriptions[-5:]&_=1533276806673
return 400 without response body. On the server side there are not any errors.
This is the screenshot with the problem:

Could you advise how to fix the issue?
Thank you,
Slavka Petrova