5.6.0.13 Session filtering issue

Just loaded up the 5.6.0.13 beta and noticed an issue with the session filtering. It's easier to explain the process to produce the bug, so:

1. Load RDM. You should have your full session list.
2. Use the Filter sessions searchbox in the footer to start filtering the list.
3. After the filtering starts to be applied, press Up or Down on the keyboard.

The result is that the first filtered session in the list is highlighted, all other sessions disappear from the filtered list and the filter criteria that was entered is cleared. Pressing the Clear button next to the Filter sessions box does not clear the active filter. The only way I've figured to get the list back is to either restart RDM, or enter another filter then clear that new filter.