This isn't really a bug report, it's a symptom of a tool that hasn't kept up with how people actually work. The user did everything right: enabled Developer mode, placed form controls, and tried to edit a group box. Then they deleted the label, and the group box became invisible to the cursor. The only way to select it now is to guess its position or give up. That's not a workflow problem. That's a design failure that turns a simple edit into a dead end.
What this means in practical terms is that a user who builds even moderately complex spreadsheets is left stranded by a legacy interface that assumes you'll never need to touch a control after placing it. Group boxes in Excel for Mac are essentially orphaned the moment you remove their text label. There is no selection handle, no outline, no keyboard shortcut that brings them back into focus. The pointer simply passes through to the cell beneath. For anyone managing forms, dashboards, or data-entry sheets, this isn't an edge case, it's a daily frustration that wastes time and erodes confidence in the tool.
We think this reveals something larger about the gap between what spreadsheet software promises and what it delivers. Users are expected to master arcane workarounds, like opening the Selection pane or using the Name Box, just to recover a control they placed themselves. That's not empowering. That's asking people to adapt to the software's limitations rather than the other way around. The problem isn't that the user deleted a label; it's that the software treats that label as the only way to interact with the object.
The fix for this specific case is straightforward: use the Selection pane (under Home > Find & Select) to locate the group box by name and select it there. But that workaround should not be the answer. A tool that claims to support form creation should let you select any control you've placed, regardless of whether its label is visible. Until that changes, every group box you delete a label from is a small betrayal of trust. Users deserve better than a tool that hides its own components.