Currently, GitHub for Jira parses branch names and pulls issues out of the description if they match, regardless of the surrounding characters. Something like

sedhw-tls-6forhaven

will match issues with the key TLS-6.

The suggestion here is to parse only by whole word, or specific characters surrounding the branch, like so:

sedhw-tls-6forhaven --> ❌
sedhw-tls-6-forhaven --> ✅
sedhw-tls-6 --> ✅
sedhw-tls-6_ --> ✅
tls-6forhaven --> ❌
tls-6-forhaven --> ✅