Hi all
I send you a code in which I use the module "ancientgreek" to write the vowels with the sign of long and short. In the case of the short vowel, the sign appears perfectly, but in the case of the long vowel, a rare sign appears. Does anyone know how to solve this?. Here's the code:

\enableregime[utf]

\usemodule[ancientgreek][Font=GreekOldStandard,scale=1.1]

\starttext

Alpha longa \localgreek{\={a}}

Alpha brevis \localgreek{\u{a}}

\stoptext

thanks