Livecode extension Builder: manifest file disappear

[trevix]

Hellooooo!

On one LCB extension, but not on others, when in Livecode, with no stack loaded, I open the Livecode Extension Builder (LEB for short), I can clearly see in the Finder that the manifest.xml file gets deleted from inside one iOS extension directory.

If I place back the manifest file in the directory, after having opened the LEB, when loading the lcb file, the manifest gets deleted.
Beside this absurde behaviour (even though I may understand that LEB doesn't like something in my extension) there clearly a cache problem since even restarting LC, no stack loaded, opening the LEB delete the manifest from that directory, even before loading any lcb file.
Solved only restarting the Mac but, in this case, the Manifest disappear when loading the lcb file.

Meanwhile, other extension lcb files load and compile nicely without touching any Manifest.

I am in OSX Sequoia.
Some suggestions? I tried to remove most anything form inside the extension folder, to no result.
So, something happens when opening the LEB (I believe the UI "revExtensionBuild" stack), but I don't have any tool to follow the stack loading (no trace debug) and understand what happens.