Q. [ɣ] between [i], [e] and a vowel became [j]; [{ie}ɣV] > [{ie}jV]

Reference ✧ PE19/70 ✧ for example: tie < ✶tegē

Related

Phonetic Rule Elements

[{ie}ɣV] > [{ie}jV] ✧ PE19/070.2801 (ʒ > [ı̯]; after ē̆, ei, ī̆); PE19/071.0105 (ē̆gē̆ > eı̯e)