I think the problem is related with activities that contain non Thread Safe variables, because this is usually happening while using Parallel or Pick activities and trying to cancel the branch that contains any UiPath activity but especially Ui interacting ones.
Stef_99
ashokkarale
lrtetala
anjani_priya
Ajay_Mishra
Anil_G
samantha_shah
Hacene_SENDEL
Happydayyy
Sathish_Kumar_S