If you go to Coupons and select the ˋAvailableˋ tab, you can set a filter one line further down (e.g. melectronics). If you now have no coupons available with the set filter, the filter line is completely hidden and you can no longer select ˋall ' as a filter and thus no longer activate any further coupons!!! However, if you receive a double coupon again, for example, you have an entry under melectronics again and can set the ˋall ˋ filter again.
This problem persists even after restarting the device. As I now have a double Cumulus coupon, I can unfortunately no longer upload a screenshot, as this remains visible for all filters (and I can therefore also switch back to ˋalle '). But please check!