Please fix trail of chaos progress when you disconnect

I'm trying to farm trail of chaos and literally can't do it due to all the disconnects. Three times in a row ive gotten to level 4,7 and beat the boss on level 10 then disconnected and lost progress. I was literally 2 steps away from picking the rewards up after the 10th floor boss and it froze, disconnected and lost it.
In sekamas when you disconnect you don't lose your progress, Why do i lose my progress when i disconnect? Very frustrating. It can't be that hard to save what floor your on if you disconnect.