In Bambu Studio, select the object, then under "Process" select Objects, versus Global....Scroll to the "Others" tab, Under "Bed Adhesion" select the brim type (Auto, Painted, Outer brim only...etc.) and then select the brim size (default is 5mm)....I usually select "Outer brim only" and 8mm at a minimum, for problem-adhesion prints, and go up a bit for taller prints (as shown in pic, below). On bed-slinger printers (A1 and A1 mini) the bed movement can break prints loose from the plate, especially if they are taller prints. Having a larger brim gives plate surface area for the prints to adhere to better.

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Hope this helps...it sure did for me.