Gitlab macro issue table renders assignee and time_stats.time_estimate as raw API values instead of readable text

When using the GitLab macro with fields including assignee and {}time_stats.time_estimate, the output is not a readable text:

• assignee shows the entire raw GitLab user object, e.g. {}[id:455, username:username, public_email:null, name:UserName, state:active, locked:false, avatar_url:null, web_url:...]  instead of just the user's name.
• time_stats.time_estimate shows the raw value in seconds, e.g. 86400  instead of a formatted duration (e.g. 3d)