In case you need a sample.gh (9.6 KB) This is a monster of a bug with dire consequences (hopefully easy to fix). Got me new grey hair today. [image] [image] OK in V7 [image]

hi @Piotr thanks for reporting, I logged the regression as: RH-91938 Offset shift

BUG'o'saurus - curve offset shifts the order of the segments

brian (Brian Gillespie) April 14, 2026, 9:43pm 3

RH-91938 is fixed in Rhino WIP

Topic		Replies	Views
Offset bug Rhino for Windows bug , rhino6	4	3237	March 16, 2020
[Bug] Offset creates additional curve segments? Serengeti (Rhino WIP) windows , offset , grasshopperrhino , offset-curve	11	281	April 14, 2026
Offset - different seam in opposite directions Grasshopper windows	11	236	June 11, 2024
Bug with curve offset Rhino for Windows windows , rhino7	44	1581	August 2, 2024
Offset moves Curve seam in latest version - bug? Grasshopper windows	6	339	March 25, 2024