Strange behaviour in "Save" window

[j-man]

Hi. I'm posting here to report a strange behaviour in the "Save" window. I'm using a MacBook Pro 2023 16" with M3 Pro with MacOS Tahoe, version 2.8.1 compiled by Kadiwa and available here.
When I'm in the "Save" window the four arrow keys don't move the cursor in the name tab, but they continue to move the position bar by frames or cut points.
UPDATE: on another build available here the arrow keys work correctly.
By the way, in every Avidemux release I tried - as fas as I remember - text can't be pasted in the name tab. That would be an useful feature.