During daylight saving change (DST) an error occurs.
Since we have camera shots at interval for most screens we can guess how the bug is working:
If a DST-change is happening during a timeline/scheduling, the next timeline/loop will not work. (black screen)
For example:
If the customer is running 1h timelines. The problem will occur around 4-5 o'clock and screen will be black 1h, until next loop begins.
If customer is running a 24h loop. The problem occurs some time during the day after DST. And the screen will be black 24h (during the monday).
I believe the bug should be easily fixed