Has there been a change in how forums are compressed into groups and then expanded by clicking on the chevron next to the group name and how the status of that is saved and then restored in subsequent sessions?
For example this forum is one of five in the WELCOME group. Until a few days ago I could compress a group in which I had no interest and leave expanded those I wished to follow and read. And those group settings would be preserved for future sessions. But now my login restores the green bubble marks to show which forums contain unread topics but it no longer restores the status of the groupings and whether any is set to compacted or expanded.