TESEO-LIV4FM no fix with custom board and software

[DrPi]

Hello,

I've made a custom board populated with a LIV4FM module and many other components.
The LIV4FM communicates through a USART with a STM32U5 correctly but do not find any satellite.

Here are questions :

I use a patch antenna. It is connected to the LIV4FM through a capacitor. The patch antenna is DC shorted. Due to a BOM error, the capacitor was replaced with a 0ohm resistor. So the RFIN pin of the LIV4FM module has been shorted to ground. I've replaced the resistor with a capacitor without success. Is the short-circuit fatal to the module ? 

I use my own code to send and receive messages to/from the LIV4FM module. I used STMCubeMX getpos application as example code. Sending messages to the module works as expected. Receiving messages works too. I've read that the LIV4FM module just need power to find satellites and deliver messages. Do you confirm this or did I miss some initialization code ?

Here are the messages the LIV4FM module send itself after power-up :

$PSTMVER,FreeRTOS_V10.4.3_ARM*57
$PSTMVER,BINIMG_STA8041_4.6.8.5.10_ARM*35
$PSTMVER,SWCFG_86065331*62
$GPTXT,DEFAULT PVT CONFIGURATION*2A
$PSTMSWCONFIG,1,0,12,00000af005070a0a0e0d0c0b0a090608070203630e110404180c0155030000500fffff0f0714000affffffffffffffffffffffffffffffffffffffffffffffff*1D
$PSTMSWCONFIG,1,1,12,ffffffffffffffffffffffffffffffffffffffffffffffffffff010101000001094005ffffffffff449641095f53884000000000000000000000000000000000*4D
$PSTMSWCONFIG,1,2,12,ffffffff00000000ffffffff000000000000000000000000ffffffff000100000019000000000000ffffffffffffffffffffffffffffffff0000120005282000*13
$PSTMSWCONFIG,1,3,12,01323200050358020a0a0000fe03000010f08334d50300a42023c07e00000000000000005f5388402023c07e0000000000000000000000000000000012090000*1A
$PSTMSWCONFIG,1,4,12,120000009a106464ae618400000001000000000000000000000000000000000006000000ffffffff040000000100000000000080b004780503000000f0c3f7ff*45
$PSTMSWCONFIG,1,5,12,00000000ffffffff000000000c0a00020fb4a005f5310000010a1900330a0a1400510000810e000000001810000008000e01000000000000020f000000000000*13
$PSTMSWCONFIG,1,6,12,0000e803ffffffff0610000080ba8c014810c703ffffffff9abed2e6edf2fafb0000020205060101ff00ff00ff00ff00ff000000ff00ff000000000000000000*4D
$PSTMSWCONFIG,1,7,12,9a9999999999b93f000000000000e03f0000000000000000000000000000f03f4bc431896f754440f0f67e923d8d2c408c65456bb71b56404b0484b86d3da53e*1E
$PSTMSWCONFIG,1,8,12,0cb8df888b2f9c3e2b69a4292b1b503e0cb8df888b2f9c3e4b0484b86d3da53e000000000000000000000000000000005feffe78af8e44406c21c84109c32b40*4B
$PSTMSWCONFIG,1,9,12,00000000000024401d8f19a88c8f4440598b4f0130be2b4000000000000024407ac2120f289f44402315c616828c2b400000000000002440ace28dcc239f4440*11
$PSTMSWCONFIG,1,10,12,95826e2f698c2b4000000000000024400f0c0c120f0c0c120f0c0c120f0c0c1244454641554c542050565420434f4e46494755524154494f4e00000000000000*76
$PSTMSWCONFIG,1,11,12,00000000000000000000000000000000000000000000000000000000000000000000000000000000*26
$GNRMC,,V,,,,,,,,,,N,V*37
$GNGGA,,,,,,0,00,0.0,,M,,M,,*56

$GNVTG,,T,,M,,N,,K,N*32
$GNGST,,,,,,,,*49
$GNGBS,,,,,,,,,,*5F
$GNGSA,A,1,,,,,,,,,,,,,0.0,0.0,0.0,1*33
$GNGSA,A,1,,,,,,,,,,,,,0.0,0.0,0.0,3*31
$GNGSA,A,1,,,,,,,,,,,,,0.0,0.0,0.0,4*36
$GNGSA,A,1,,,,,,,,,,,,,0.0,0.0,0.0,1*33
$GNGSA,A,1,,,,,,,,,,,,,0.0,0.0,0.0,3*31
$GNGSA,A,1,,,,,,,,,,,,,0.0,0.0,0.0,4*36
$GNRMC,,V,,,,,,,,,,N,V*37
$GNGGA,,,,,,0,00,0.0,,M,,M,,*56

$GNVTG,,T,,M,,N,,K,N*32
$GNGST,,,,,,,,*49
$GNGBS,,,,,,,,,,*5F
$GNGSA,A,1,,,,,,,,,,,,,0.0,0.0,0.0,1*33
$GNGSA,A,1,,,,,,,,,,,,,0.0,0.0,0.0,3*31
$GNGSA,A,1,,,,,,,,,,,,,0.0,0.0,0.0,4*36
$GNGSA,A,1,,,,,,,,,,,,,0.0,0.0,0.0,1*33
$GNGSA,A,1,,,,,,,,,,,,,0.0,0.0,0.0,3*31
$GNGSA,A,1,,,,,,,,,,,,,0.0,0.0,0.0,4*36