15' putt.
Slow, flat, dead center chains.
Bounces straight back out.
I believe 95% of the commiserative 'You got robbed' putts are more 'close but not quite' putts that failed due to thrower error. In this instance, I felt robbed, the only time I can recall this happening in recent memory. A few holes later I had a similar putt bounce back on the same manner though it was lower and caught the inside of the bin. The chains on the Liberty are too light and there are 'bad' angles at which one is not catching much chain, or at least more than what I've experienced on other baskets. For me at least, I felt the single chain Discatcher Sports I have for practice caught good putts better.
Simple answer here is to adjust one's putting to the basket. Some of the older DGA models are less speed tolerant so just slowing it down resolves the issue. The problem I have is that for me to adjust my putting to this basket, I need to change my putting style and/or targeting from that I use on any other design.
All that said, they're not bad baskets. They seem to be better at catching high putts and for whatever reason feel like they have a greater target area. These might be advantages for some but I would personally prefer a basket that always catches my good putts over a basket more likely to catch my bad putts.