So when the patch came, my guild leveled up and somehow got 2 levels instead of one (the bug). So myself and some others deposited materials for one of the next upgrades that became available.
Then came the hotfix Fixed a bug that errantly displayed guilds as one level higher than they were.
So okay, that was fixed.
But now, suddenly all the materials which were deposited for this “one level higher” upgrade have disappeared from the treasury . I checked my bank and the materials i donated were Not there. They have just gone poof completely. (And no, they were not used on anything else, as they were specific to this upgrade). The upgrade panel says 0/x again.
Before the hotfix, the treasury showed all the materials and values quickly (e.g. 200/200)