Modal or new page when switching from list to detailed view? (in an issue tracking system)

I am currently working on an issue tracking system (you might want to compare it to Jira, but more lightweight). The main screen of the application is this issue list:

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When a user clicks on an issue, I can either open the issue in a modal view (e.g. like Trello):

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or open it in a new page with a back button to get back to the full list:

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I am undecided since there is conflicting advice on this.

The modal view has the advantage that the user stays in context of the issue list. Which requires less mental switching cost. The new page has the advantage that it is better suited for more content. Especially when a scroll-bar becomes necessary and also works better with built-in browser navigation.

Which option is preferable in this context?

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