Guild Bank items gone

… and I wonder if this is one of the things that may have caused the issue with the Guild banks in the first place. This person is having issues accessing their guild bank with their alts on different realms. I seem to recall characters on other realms could not, initially, access guild vaults (I’m assuming this is now not the case?) - but if they’ve done something to enable them for cross-realm guild members, then perhaps that’s had a knock-on effect?