Seaborn FacetGrid "Axes instance argument not found" -- when command cells run individually (F9)

[p zajonc]

I updated spyder and conda modules yesterday trying to get around this issue.  The resolution is puzzling to me.  Can anyone help explain?

I have an untitled set of code following the FacetGrid examples:

```

import seaborn as sns; 

tips = sns.load_dataset("tips")

g = sns.FacetGrid(tips, col="time", row="smoker")

g = g.map(plt.hist, "total_bill")

```

as a block of code it runs.  Running this pressing F9 one line at a time?  Last line gives error message:

```

ValueError: Axes instance argument was not found in a figure.

```

Sounds harmless but it is a surprising result.  Not sure why the issue popped up just with this particular code, and perhaps it can happen elsewhere.  Any explanation appreciated.