TPS82140: Entery capacitor becomes in short-circuit

Part Number: TPS82140

Hello,

i made a design powered by a TPS82140.  The product is a GSM (2G) Modem, so we have some current peaks (less than 1A at the entry).

Components are the same as datasheet specifications except the entry capacitor put at 22uF (16V X5R), which should be better.

On 3 products (from 200 manufactured), this capacitor comes in short-circuit after about 3 weeks used.

Is someone have ever seen this problem ? Could it be due to current peaks ?

Thank's for answer.

Regards

Romuald