Word or shorter term for "Possibly delayed", as in the capacity for unreliable timing

I'm looking for a word or shorter term for "possibly delayed". This is not expressing any probability of a delay, just the capacity to be delayed.

The specific usage I have in mind is: the displayed information may be up-to-the-minute, but if for some reason the connection fails, it will fail back to displaying yesterday's information.

Therefore, this is "possibly delayed information".

Another example would be: You should be sure to order a replacement cartridge well in advance of when you expect the current one to be depleted, since shipping could be possibly delayed.

Shipments are not currently delayed, but the nature of shipments is that they could be either timely or late.