I use this option (Shared Glossaries) and in 1 from 3 projects of mine I enabled translate glossary.
And I expect that regardless of Shared Glossary option, only native glossary to project 1 will be open for translation in project 1, but instead in that Glossary file I see terms from all 3 Glossaries.
Is this a bug?
Always been like that, a default behaviour. I think this a outdated button that would be removed soon. At least all goes into this result. Try using this application, it offers the same capabilities but with very easier workflow, install, chosee glossary and go on Discover the right solution to enhance Crowdin experience.