In message , at
01:40:04 on Wed, 1 Mar 2017, Matthew Dickinson
remarked:

One change will be that PAYG balances will no longer be displayed at the gateline or bus reader
(although low balance warnings might be pushed to gatelines and bus readers) which is one reason
why TfL want their own app up and running.

That's verging on the unacceptable. But conforms with my general theory
that new technology almost always introduces obstacles/drawbacks of its
very own, that were not in the previous revision.

My own classic Oyster occasionally flashes up a message about "your card
is about to expire", or something similar (if they want people to read
it they should display it longer). But it isn't, and the next gateline
won't repeat it. Mystery glitch perhaps.
--
Roland Perry