interactive ploting problems matplotlib

[jfmoulin]

It seems the interactive plotting with matplotlib does no longer perfectly work in ipython.
With Ipython 7.13.0 and matplotlib 3.1.2, I start my session with

ipython --matplotlib=qt

and most (not quite sure, I have the feeling it is not 100%**) of my plotting commands execute as expected and deliver an interactive figure (shell still responsive). Nevertheless I noticed that lately plotting commands executed in a script (invoked with run -i) do not produce a visible figure until I explicitely call plt.show().
I am pretty sure this was not the case earlier ...

** it might be that the plotting commands are executed within methods of objects I instantiated from a script... (I cannot find a working example at the moment.)

Sorry for the vagueness of this issue... Any comment welcome

[kwsp]

Please provide more information (minimal reproducible example)