Not sure if this is common but I have a queue of at least 1GB pretty much all of the time. When I get an out of memory error the queue gets deleted, starting from the bottom item. I recently updated to the latest version and accidentally downloaded and used the non LAA(for some reason I have to use the LAA version under windows 10, under windows 7 the regular version works fine on the same system). When I started alt.binz I immediately got an out of memory error and I closed alt.binz. After installing and starting the LAA version I noticed files in the queue were missing. As this happened before I had a recent backup of my queue so I replaced the backup and everything was fine again.
I don't think this could really be prevented but maybe a queue backup option could be implemented. Not an essential feature as I backup regularly but if others are having the same problem maybe this would be a good feature.