Bending the antenna breaks the connection

Hi Devzone,

We are using the nRF52 DK in a prototype which is under stress, and we noticed that any bending of the board breaks the BLE connection.

To easily replicate the problem, one can put something within the 2 holes in the centre of the board (like screws) and just put some stress between them, the connection breaks for a few seconds. Vibrations can also replicate the symptoms. 

I wanted to know if this is a known problem since I couldn't find any other complaint about it. Could it be batch specific?

Is there a recommended product to use an external antenna on the nRF52DK? 

For now, we are trying to minimise the mechanical stress to make sure it holds, but any other idea is welcome.