I am not sure if the first is a real bug. Since updating to the current version, I notice that applying Force Unchoke mostly leads to disconnections by the other peer. This also happened in earlier versions, but not as often. I can not prove this, but it is based on my observations.

An other possible bug, is that the visualisation of the transfer of parts from individual peers is not always visible. Sometimes the GUI says that I am receiving speeds of (for example) 500 kB/s In from an idividual peer, for a longer duration (30+ seconds), but in the Address field of the Peers section, there is no triangle that allows you to unfold the transfer to observe the individual parts.