Converting an egg with named UV fields to maya produces a maya binary with broken UVs. For instance the top tag will convert with broken UVs but the bottom one will convert correctly.
<UV> UVMap { 0.802775084972382 0.206263214349747 }
<UV> { 0.802775084972382 0.206263214349747 }
Tested with maya 2018 and 2017.