It also seems like the new screens (at Cambridge and Ely at least) can't cope with trains that are terminating at a platform and then going out of service. They continue to show the next departure available to passengers whilst the arrival that is going out of service is still sitting at the platform, leading to people trying to board it and staff continually having to stop them.
I first noticed this a few weeks ago whilst waiting for the last train of the day from Cambridge to Ely (00:08) - a terminating Thameslink train arrived at 23:54 and was still being advertised as the 00:08, causing many people, some having had quite a bit to drink, to try and board it. I noticed this one in particular because some of the extra security staff they have on Cambridge platform late at night on Fridays/Saturdays were not explaining this particularly well to some of the "merrier" passengers (e.g. "you should know it's not actually the 00:08 because it isn't 00:08 yet") and I was worried something might kick off as a result.
But then having seen it once I'm now seeing it all the time: the 23:54 arrival in Cambridge that I first saw is definitely not a one-off, and I see the same thing regularly with 09:22 and 18:41 arrivals in Ely, none of which I ever see shown as "this train is not in service". There are other times when I've seen it, but the three I've quoted are the ones that I've seen the most often.