nrfutil CLI issues

Question

Hi, 
 
 I'm working on a testbench to flash product with nRF5340 and nRF52840 chips. 
 In order to erase/flash both I'm using JLink Base compact and nrfutils CLI. But I have fews issues: 
 
 Sometimes, the JLink didn't reset successfully (led switch to orange) and the next command line will fail with the error code: [jlink] JLINKARM_DLL_ERROR, code: Nrfjlink
 
 Below the output of the command performed few times in a row where we can se that sometimes operations ends without issue and sometimes error is raised > rfutil.exe device recover --serial-number 822007655 --x-family nrf53
v Recovered 822007655

> nrfutil.exe device recover --serial-number 822007655 --x-family nrf53
x Failed to recover 822007655, [jlink] JLINKARM_DLL_ERROR
Error: One or more recover tasks failed:
 * 822007655: [jlink] JLINKARM_DLL_ERROR, code: Nrfjlink

>rfutil.exe device recover --serial-number 822007655 --x-family nrf53
v Recovered 822007655

Commands runnning forever. In some case operation doesn't stop and the only solution is to disconnect/reconnect the JLink. Is there a way to use timeout as parameters in the command lines ? I didn't find topic about that 
 JLink not found with nrfutil:
 
 >./nrfutil.exe device list

FTDPOE5G
product TTL232R-3V3
ports COM24
traits serialPorts, usb

FTDPOGGJ
product TTL232R-3V3
ports COM21
traits serialPorts, usb

777641824
product J-Link
ports COM20
traits jlink, seggerUsb, serialPorts, usb 
 Here we can see that only one JLink is find while 2 are connected as shown with J-Link Configurator

Any helps on this topics will be appreciated ! 
 
 Below are some details: 
 
 nrfutils --version
 
 nrfutil 7.12.0 (39003c9 2024-06-10) 
 commit-hash: 39003c9d0e5d946af0f417cfadf4ac55a6d03c19 
 commit-date: 2024-06-10 
 host: x86_64-pc-windows-msvc 
 build-timestamp: 2024-06-10T15:56:55.227746900Z 
 classification: nrf-external

SEGGER Tools version V8.12d

I was initialy running the command line in python with subprocess.Popen where I first saw the issues and I was able to reproduce the errors using usual consol (MobaXTerm) 
 
 Best regards, 
 Antoine