AW can no longer move the current time before the first key

1. What happened
When I try and move the current time (red line) before the first key, the red line snaps back to the first key.
This did not happen in 5.0

2. How we can reproduce it using the example you attached
Create a Cube
Open the AW
Click create to create a clip
Click Add Property and add the Cube : Translation
(you should now have two keys, one at frame 0, and the other at frame 60)
Move the second/last key to frame 120, and move the first key to frame 60

BUG: Try to move the current time (red line) before the first key... it snaps back to frame 60 :(

If you enter frame 0 in the current time field (top left corner of AW) the current time becomes 0, but then snaps back to 60 as soon as you click the UI again :(

You are able to set the current time past the last key (expected), but are not able to do the same thing before the first key (not expected).