Looking at the reports, the UUID's are xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx, so V4 UUID's, which should be pretty hard to guess (barring bad PRNG, but that's a whole different problem)
Yeah, that gets you 122 bits of entropy (with a good RNG) so that should be fine. I mainly pointed that out just in case anyone assumes "UUID" automatically means "random UUID" and fails to check whether their particular UUID generator uses v4 or something else.