If the edge you are going to slide along is very close to in line with the adjacent beveled edge, then there will be sharp overshoots. There is an epsilon comparison to just abandon loop slide if this situation is happening. That epsilon used to be 0.25 radians, but bug T86768 complained that that value was too high, so it was changed to .0001 radians (5 millidegrees). Now this current bug shows that that was too aggressively small, so this change ups it by a factor of 10, to .001 radians (5 centidegrees). All previous bug reports remained fixed.