That looks like a broken custom field plugin, or tweaked code in the core. Have you got customisations like either of those?
Could you try narrowing down the search and see if you can find a pattern when it breaks (e.g. it's only project X, or issue type Y, or when field Z has data)?
I’m a designer on the Jira team. For a long time, I’ve fielded questions from other designers about how they should be using Jira Software with their design team. I’ve also heard feedback from other ...
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