<b35> Compile format unexpectedly duplicated in format list

I have several custom compile formats under the My Formats section.

Yesterday, after I’d made a minor change (can’t recall what) to a format and clicked Save, it made a duplicate entry in the format list.

These both seem to refer to the same format, because if I rename one of them, the other also changes name.

A bug?

Yep. LH 4180. I thought they’d solved that one.