Cannot exit data mode on GL7600/HL76XX

I am trying to send HTTP Post requests with my GL7600 Modules, but i cannot exit the data mode when setting the header of the request.

I am following the example from the manual:

The EOF String is not recognized and i dont return into command mode.
I have been using the EOF string returned by AT+KPATTERN , “+++” and “DTR drop”.

The latest firmware is running on my device (GL7600 (Generic) (GL7600.2.23.172400.201706231140.x7120m_1)

HW Flow Control is enabled (AT&K3). I have this problem on all four of my devices and with different SIM Cards.

HTTP Get Requests work without any problems.
Sending POST Requests to my server with with tools like reqbin also works.

Thank you for your time and I hope somebody has a solution.

Hi @a.fortino,

Could you please update the latest Firmware at link below and try again?