Any open issue on Fixflo can be put on hold.
Once in an issue click on the 'Actions' button and then click on 'Edit Issue'
Here you will be able to change the 'Issue chase date' and place the issue on hold.
Once the chase date comes around the issue will come back into your 'Issues requiring attention' and this brings the issue back to your visability.
Please note that you can still access an issue when it's on hold.