iPhone 4 stuck in DFU Mode (Failed to Switch to Recovery Mode) During NVRAM Clearing Process

[Owenbigmilk]

When clearing the NVRAM, after manually entering DFU mode and waiting for the processes of Sending ibss and sending ibec to complete, the program will display finding device in recovery mode. However, my iPhone actually fails to exit DFU mode and enter recovery mode automatically. Even if I manually hold down the Power button and Home button, it still cannot enter recovery mode.
I have tried this many times, and also attempted unplugging and re-plugging the data cable. Additionally, I tried launching other third-party software on the computer, hoping to switch the iPhone to recovery mode within those few seconds, but it didn’t work—because no other software can detect my iPhone 4 during this phase.
If anybody knows how to resolve this issue, please kindly inform me. I would highly appreciate it.