If you want to use a RegEx when filtering for Graphs in TreeView or Preview View, filters are not applied correctly. I don't see any results. I have graphs with with title "devicename has a bgp session" and many others. Up to 1.2.16 it was possible to see all the graphs with the filter "device.*bgp.*". Since 1.2.17 this is not possible any more.
I have found out that the changes that were applied in #4080 introduced the problem. After reverting the appropriate lines I can use RegEx as filter again. So the fix introduced another problem on my site.