End Of Prior field sometimes displays 'undefined' instead of values

[nojronatron]

Describe the bug End of Prior field might display '#, undefined, none, D:undefined...' under certain circumstances.

To Reproduce Steps to reproduce the behavior: Not yet understood. Will update when I find a reproducible pattern.

Expected behavior If there are undefined fields in an End Of Prior entry, it should be left blank/empty.

Screenshots Add screenshots to help explain your problem, only if necessary.

Desktop (please complete the following information):

• OS: Win11
• Browser: Firefox
• Version: 126.0.1 (64-bit)

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context

• Has not been seen on Mobile browsers.
• Started with v2.0.1 AFAICT.