See below. As soon as I add strokefingering to the chord, it affects the
position of the fingering indication for the B. I don't have a previous
version of LP installed to test against, but this behaviour has changed
somewhere along the line, as the actual score I was working on looks
fine on the PDF I created using 2.13.42 but shows the same wierdness as
my test example when built with 2.13.61.
\version "2.13.61"
\relative c' {
\override Fingering #'staff-padding = #'()
\override StrokeFinger #'staff-padding = #'()
\override Fingering #'add-stem-support = ##f
\override StrokeFinger #'add-stem-support = ##t
\set fingeringOrientations = #'(up down)
\set strokeFingerOrientations = #'(up)
<f-3 b-0>8[ <f-3-\rightHandFinger #2 b-0> <f-3-\rightHandFinger #2
b-0-\rightHandFinger #3 >]
}