getExportFileExtension is giving wrong extension name

Hi All,

While calling app.project.activeSequence.getExportFileExtension(preset.fsName) getting unexpected result.

This is happening for MPEG4 preset -'C:/Program Files/Adobe/Adobe Media Encoder CC 2019/MediaIO/systempresets/4E49434B_4D503420/3GPP 176 x 144 H.263.epr'. Getting 'mp4' as the extension name. But when we use the preset in AME, get '3gp' by default.

Windows 10

Adobe Premiere Pro 2019

Version 13.1.4 (Build 2)

Please suggest.