Bumpy Corner Bead

Have any of you ever seen this? Do any of you know what might cause it?

Paper tape edge.

If not sufficiently mudded when applied they don’t adhere. Amateur work IMHO.

That’s why I almost always used nailed ones.

Application Guide (PDF)

Just as Michael Larson stated, improper/non-standard finishing techniques.

Weekend warrior work for sure, Poor craftsmanship

Agreed. Thanks guys.