I located a Blue response. Apparently it was acknowledged as a problem. Regardless, I ask everyone impacted please submit a Bug Report ( as OTHER Not Listed Here) for missing guild bank items with no log of any withdraw.
“That post in bugs is the best place to add any info you think might be helpful.” so submit BUG REPORTS for OTHER with MISSING GUILD BANK ITEMS seemingly random with no withdraw log entries.
Best of luck to all. I hope we all get our guild saved loot back.