My interaction.plot is missing a data point

Hi, and welcome!

Please see the FAQ: What's a reproducible example (`reprex`) and how do I do one? Using a reprex, complete with representative data will attract quicker and more answers.

For this type of problems, screenshots are seldom helpful, and if it takes too long to reverse engineer the problem, peeps are unlikely to attempt a cure. Usually, the big problem is the data. It doesn't have to be all the data, or even your data, a built in data set like mtcars that just illustrates the problem is fine.