I'm the guild leader of s.31 Symphonia, and several of my members have reported lost materials while using the auto-upgrade button. Materials include elixers, spirit points, upgrade stones, etc. Asking around, I have discovered that this is actually a KNOWN ISSUE that has never been addressed or acknowledged. We actually had a member lose 1000's of elixers while attempting to upgrade a rank. A game mod came to investigate it, but we've been waiting for over 2 weeks with no further action taken. This is completely unacceptable. Some of us are paying VIP members and have spent cash on these items, only to have them poof from a long-standing issue that has never been addressed. I'm hereby serving you notice that if there is no satisfactory action taken within the next 14 days, we will be escalating the issue to other 3rd parties. Thank you.