Behaviour

My context is kind of mono repository that each project has itself life-cycle.
Currently, I separate GitHub release tag as: project/semver

Steps to reproduce this issue

1. Input

# Ref context
refs/tags/project1/v1.0.0
# GH docker meta
tags: type=ref,event=branch
  type=ref,event=tag
  type=ref,event=pr
  type=sha
  type=match,pattern=project1\/v(.*),group=1

2. Output

project1-v1.0.0

It should be 1.0.0 ???

Expected behaviour

I'm wondering how to make tag chaining from match to semver. I have not yet understand prefix/suffix/value for what purpose.
In my case: I expect tag output is

• 1.0.0
• 1.0
• latest

Another thing, typo in https://github.com/crazy-max/ghaction-docker-meta#typematch

tags: |
  type=group,enable=true,priority=800,prefix=,suffix=,pattern=,group=0,value=

Should be type=match?