Planning Security access issue in 11.1.2.3.500

Hello,

We are using EPM 11.1.2.3.500 on a linux distributed environment and we have planning security access issue mentioned below:

We have a planning application that was provisioned to more than 55 groups. We have assigned access to 50 groups on a member in dimension and when we try to edit access to a group that is in first 25, I can see the edit access screen but when I try to edit access to a group that after 25, instead of showing edit access screen, it is showing assign access screen.

Please provide us a solution for it and recommend if there is any patch available to fix this issue.