CSS: buffer function generates an issue when using fill and stroke

Description

The following SLD code in xml generates a style as shown in the attached image (SLD_buffer.png)

if I use the following CSS code the stroke styling has drawn around the buffer (CSS_buffer.png)

I found this workaround to obtain the same result of the SLD code but it uses double geometry and opacity (CSS_w_buffer.png)

Environment

GeoServer Version
2.10-SNAPSHOT

GeoTools Version
16-SNAPSHOT (rev 496a4213f3794ac09dd94634526998cae29b10e4)

Status

Assignee

Andrea Aime

Reporter

Stefano Bovio

Triage

Components

Fix versions

Affects versions

Priority

Medium
Configure