Hello! My team and I recently completed the "Quarter Hour" triumph for Zero Hour on Expert. The triumph states that we need to complete the mission in under 15 minutes. A lot of previous posts regarding this triumph recommend trying to beat it well under 15 minutes. We finally got the time down to 13:21 and no one got the triumph. Any advice or help? Been working on getting this triumph for a while and hope I haven't missed my chance to earn it. The pic above is our most recent run. Thanks!