Pluto keeps running into "UndefVarError: .... not defined" after some times

[dmetivie]

Pluto works fine and randomly after some time and usage (like every 10 mins sometimes), it suddenly declares

UndefVarError: a_variable_name not defined

even if the cell where a_variable_name is defined has not been touched.
ReRunning the cell a_variable_name most often shift the problem to another variable, e.g.

UndefVarError: a_previous_variable_name not defined

doing that iteratively, I typically end up rerunning
using SomePackage at the top of the notebook.

I don't understand where this comes from, and I don't have a MWE since this seems to be quite random (I'll try to post a video next time it happens).

Anyone else encounters that type of issue?

[Pangoraw]

Hi, your problem looks definitely related to something like #2090 which is a known bug. It is hard to determine the precise causes without a MWE or a runnable notebook.