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Yes I have reproduced this in an empty project.
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a. Create an empty project
b. Add action and axis inputs for Motion Controller (L) Grip1 and Motion Controller (R) Grip1
c. in an empty scene level blueprint create events for the action and axis inputs we just created
d. connect the events to Print String nodes to log the result (as in attached pic)
e. run the project with the VR preview
f. use the controller grips a lot. It seems to happen more frequently when both controller grips are pressed and released simultaneously
g. eventually the grip input gets stuck on even though the grip is not physically pressed. This is evident by the axis logging 1.0 every frame and the action mapping showing pressed, but never released.