Dear BitDefender,
This has not happened as of recently so I have no dump file or other technical information to share, but in the past I have encountered problems where bdfwfpf.sys crashes with a blue screen saying "Driver unloaded without cancelling pending operations" when certain low-level drivers included with some other non-antimalware software are loaded on the system that hook in a certain way. It also happened when I used TrafficLight alongside non-Bitdefender antivirus software. Therefore, I would like to suggest that BitDefender reprogram the bdfwfpf.sys driver in both BitDefender's security suite products and TrafficLight so that BitDefender works alongside other programs such as the Citrix offline client without crashing the system in a future minor update or patch. If you can do that, that would be greatly appreciated.