I followed your procedure and initially it did not correct the situation. I then turned off the standing notification for the following one or two hour cycles. When I turned it back on it started working.
Something to note, before, at the top of every hour the bar for that hour would turn light blue. Currently, it is staying black until you complete the requirement and then it turns blue. This is not acceptable since I need a magnifying glass to see those hour markings on the watch. I had missed several hours because of that so getting the 50 minute notification back will help.
Thanks.