V-R/V-L ligature: rounded or not?

Hello,

I noticed that my manual (Sténographie Gregg by Soeur Marie Ernestine) mentions the rounding that occurs in the F-R and F-L combinations, but it remains silent in the case of V followed by R or L. Should the angle be rounded likewise or not? I find diverging examples in my manual, where avril is systematically written with a clearly rounded VR (e.g. twice on p.58, then on p.62 and I’ve seen it elsewhere too), whereas other words such as ouVRier (p.54), poiVRe (p.55), faV(eu)R (p.62) keep the acute angle. What is the general rule in English Gregg?

Thanks.