I'm talking about the "rumors" that caused the bank run. From what I've read (quoted above), these weren't really rumors but problems with day-to-day transfers that prevented the fund(s) from completing their deals, in which case one has to be insane not to let their friends know that the bank is not transferring money like they are supposed to. In hindsight we know they had problems like you said, but the "spread rumors" part seems to have been triggered by legitimate problems with regular transfers.
It wasn't hindsight though. They filed their 10-k well before the run and it showed a disaster of a situation. Their balance sheet was progressively getting worse, it was already bad the 10-q before. People knew it was problematic months ago, this didn't come out of nowhere.