[openweathermap] Strange Onset timestamps returned when alert event changes (e.g. from yellow to green)

Add-ons Bindings
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1

I’m reporting a bug I filed for the OWM binding where the onset value reported by the binding looks weird when the event state of an active weather alert is updated:

https://github.com/openhab/openhab-addons/issues/14958

Bottom line: in such events, it’s impossible to know if the event is still active at a given point in time. This does not happen with the expires value.

2

The problem is NOT related to the binding but to the alert information provider and/or the OpenWeatherMap One Call API service.

For an obscure reason the onset channel is set to a weird timestamp when the alert event turns green, at least with the weather alert provider over here.