The legality of Isabella's divorce from Humphrey was challenged in 1213, during the dispute over the succession to Champagne between her daughters Alice and Philippa and Henry's nephew Theobald IV.
Legalitas perceraian Isabella dari Onfroy ditantang pada tahun 1213, selama perselisihan mengenai suksesi Champagne antara putri-putrinya Alice dan Philippa dan keponakan Henri, Thibaut IV.