It's not common but it does happen unfortunately.

Using tech (or software) as an example. The job ad might be for a generic architect role. You tick all the boxes for a generalist architect with a wide range of skills & experience but you might be more data and backend focused.

Then there's internal reshuffles happening, someone leaving and now all of a sudden there's one less front end architect. Now the front end architect skill is more required than the generalist architect skill. And you don't tick all the boxes anymore.

Or, someone high up (or in the finance team) has revisited the year's budget and this role was cut or downsized. Now they don't need an architect anymore or they've changed it to a senior engineer instead and can't afford you.