Time delay is missing from Scene (Scenes corrupted)

Hi Sonoff,
Can you explain the following issue please?
I have 3 different Scenes which were previously working fine on 8th November. On 9th November they have all been corrupted.
As an example, I have added a screenshot of an automatic stair light scene, which was affected. When a motion detector SNZB-03P is triggered, it switches on a ZBMINIL2, which switches on a stair light. There should be a time delay entry of 25 seconds between the on and off entry and then the stairlight switches off.

Problem is that the entry for the 25 second time delay has dissappeared from the scene - without my input, and this is one of three different scenes which have been affected in the same way. Result is that the light goes on and then off immediately. The scene is useless.

Is this a server issue in the cloud?

Please advise.
W