Issues missed from the board

[Dan_Tsk]

Hi! 
After holidays I realized that some issues are missed from the agile board (next-gen project).
I can find them using simple issues filter (I see them in the list), but can't see on boards. The only way to return the issue to the board is to make any update on this issue.
It really affected our working process. 
How to prevent this situation? Can't find anything in settings.

Thank you!

[Alexey Matveev]

Hello,

Were these issues in the most right column? If so, then this issues are removed from the board automatically after 14 days.