Unity Pro

New user of Unity Pro. When connected to the PLC, when I analyze and then build a section that has been modified, it downloads and the PLC seems to pause for an instant as the new program is loaded. This messes up the machine cycle. I'm used to Allen Bradley, where you can do online programming with no affects on the machine when testing or assembling. Am I doing something wrong, or is just the way these work? CPU is a Momentum "Unity Pro" CBU. Thanks in advance!!

Did you notice if that happens because scan time is growing for that time when you build changes