I can experience a similar bug, but it is more noticeable using the open in a background tab gesture, as then you can repeat the same gesture many times to see the effect without having to switch tabs - it also makes it easier to keep the mouse in a consistent position.
Trying it just now on search result links 10 times, it failed 4:
Yup, also having that. Tho at first i tried using Down-Right gesture to replicate what you were doing, and it was working alright, but then i started using single line gesture and it became really noticable