I tested the new version (2.1.8113.16100) and I was not able to reproduce the problem. I tested this with the Focus(), the Activate() and the BringToFront() methods.
e.g.,
m_mdiManager.TabGroups[ 0 ].MdiForms[ 0 ].Focus();
or
m_mdiManager.TabGroups[ 0 ].MdiForms[ 0 ].Activate();
or
m_mdiManager.TabGroups[ 0 ].MdiForms[ 0 ].BringToFront();
Imported from legacy forums. Posted by CharlesB (had 317 views)