Smart objects updating twice
I am sorry if this question has been asked, I've tried searching everywhere for it and haven't found an answer.
I have files that contain bitmap smart objects and when I open them, make changes to them and then save them, I have to wait through the "Updating Smart Object" progress bar. Then when it's complete, I close the smart object window and go back into the file that contains the smart object, and I have to sit through the "Updating Smart Object" progress bar again. In the history for the file that contains the smart object, I can see that there are two steps listed as "Update Smart Object". I wouldn't care, but the files I'm dealing with are 10-20gb, so they take a VERY long time to update, so it's killing my productivity to have to wait for it to do the same exact function twice, if that's what is actually happening.
Does anyone else have this issue? I'm wondering if it's related to my configuration. I have an older computer that doesn't have the same problem. I am running Photoshop 20.0.4 on an iMac Pro running High Sierra (10.13.6).
Any suggestions would be greatly appreciated.

