Problem with polar_coordinates()

[Lamas]

Bonjour,

Windows 10 Pro Rev : 1709
HP Prime virtual calculator Build 2018 1 24 Rev : 13333

iPhone IOS V : 11.2.6
IOS HP Prime V : 1.4.1.13513

Problem with polar_coordinates() (in degree mode)

Functions Library extract …
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// Conversion R-P
EXPORT rp(X,Y)
BEGIN
M0:=polar_coordinates(X,Y);
MSGBOX(X) ;
MSGBOX(Y) ;
MSGBOX(M0) ;

RETURN(M0) ;
END ;
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This function works on iPhone with keyboard input (X, Y and M0 msgboxes are OK).
This function does not work in program mode with iPhone, (M0 stay [0,0] with msgbox).

The same program work exhaustively with HP Prime virtual calculator on my desktop without any problem.

Is there a bug on the new IOS HP Prime or there is a problem with my function. (With old IOS HP Prime version, funtion worked correctly).
I have uninstalled and installed IOS HP Prime, switched off an on IOS device several times without change.

Thanks a lot for your attention