Bug: Headhunter Daily Quest Won't Complete

Hey there. This isn't the first time I've had issues with this quest. Before it resolved itself somehow, I'm not sure how. Now that I got the quest again, it's been stuck at 4/7 for several days and I've killed a great deal of challenges. I'm not sure what other information to provide so just ask and I'll follow up.

Hi Abbot, thanks for reporting this. To be honest, I'm not sure what could cause it. I haven't experienced it myself so far and it looks like there are no easy ways to reproduce it. Are you playing the game on Android or iOS? What could bring some insights would be your current save folder, so that I could have a look at it and try to reproduce the issue here. Depending what platform you use, I can post a description where to find this data. Thanks for your help! :-)