I just noticed that mgear adds the path to mgear/shifter_classic_components over and over again. When I simply launch the Shifter Guide Manager, the path is added 47 times. A simple check to see if it is already in the sys.path before adding should fix the issue.
@jarombrand thanks for the feedback I will check it ASAP
I have created a ticket on github https://github.com/mgear-dev/shifter/issues/103