Bug: Missing plot refresh of tasks sharing the Matplotlib figure with the prior task

[detlefarend]

1 Describe the bug
If subsequent tasks in a workflow share the same figure (MyTask.C_PLOT_STANDALONE = FALSE), the following behavior occurs:

1. Task 1 (Owner of the figure): plots and refreshes it
2. Task 2 (guest plot): plots but doesn't refresh it since it is not the owner of the figure

The output of task 2 is shown next time when task 1 refreshes the plot.

The causing code is implemented in the class Plottable.update_plot():

2 To Reproduce
...

3 Expected behavior
The best would be to refresh the figure whenever the last task in the plot chain updates the plot.

4 Screenshots
If applicable, add screenshots to help explain your problem.

5 Additional Information

5.1 Operating System

• Linux
• Windows
• Mac OS