Hey! check you don't have any Post processing scripts run, before you slice you'll see an icon like the one below to the left of the "slice" button, i had this issue where it would change it to 15% speed at a certain layer, other than that check your movement speeds, although Cura should account for that in the time of the print. That's why the only thing i can think of is a post-processing error. Another thing you can try is if you have a speed adjustment on the printer screen, when it moves really slowly try turning it up to a different speed then back down to 100%, I've found this can also over ride the post processing options. Annotation 2020-04-08 120637.png

Best of luck! hope this helps!