As @eflyguy mentioned:
So print time shouldn’t have changed dramatically while using the same settings.
I see the print on November 14, which included the eight circles, and a total print time of 18.6 minutes.
I also went back and found the print from March to verify all the settings were the same (they were). That print was just 4 of the circles, and took 9.3 minutes.
I wasn’t able to find the print using the same design back around Nov 6.
I’m going to close this thread - if the problem reoccurs, or you’d like us to check the logs, go ahead and post a new topic.