Power reserve indicator on a Big pilot

Hello everybody. I have a problem with my power reserve indicator on my IWC Big pilot. When it displays 5,5 days the watch stops in spite of the fact they have 7 day power reserve. Is that a problem or a permissible deviation? Who has relevant experience please let me know. Many thanks.

That is a problem. The power reserve should deplete to zero in approximately seven days. Time to get it repaired.

Thanks Alan.

Had a similar issue. Ultimately it was a quick fix.

Got you Michael. Thanks.