I am using windows (not online) with Excel Version 2410 Build 16.0.18129.20100) 64-bit.
I have also found through doing some more trial and error that sometimes when the new plots recalculate it will randomly include some code or a plot from a separate visualization. For example the background on a scatter plot also has a bar chart overlaid.
Thanks for the extra information. If you’re able to share screenshots and preferably an example file, I can look into this further. I’m not able to replicate this issue at the moment but definitely want to get to the bottom of it.