“Greetings” Mission Stuck in Hero Quests

I am experiencing a frustrating issue with the "Greetings" mission in Hero Quests. The mission has been stuck at 6/20, no matter how many times I log in and claim the daily reward. I have consistently claimed daily login rewards and daily mission rewards for the past 15 days, yet the mission still only counts 6 days. This makes it impossible for me to complete the mission and progress further. Additionally, in Hero Chronicles, I have already claimed three heroes (Stam, Maicon, and Touré) and unlocked Nightmare Mode, which proves that I have been actively playing and completing tasks. However, despite all my progress, the "Greetings" mission remains stuck at 6/20. This issue has been very frustrating, as I have fulfilled all the necessary requirements but cannot advance. I would appreciate it if you could investigate this bug and provide a solution as soon as possible.