Blank images after customer upload

[m__g]

Hello, I'm facing problem with executing orders in my shop. All of my products are customizable with custom text and images( im using build in customization ) which are fillable by customer. Whenever a customer makes an order i can see it in my Back Office but some of the pictures are white without sent content. This happens to some of orders and not for all pictures, just some of them. Size of white pictures are the same as customer are sending ( i know it by contact to customer manually and request particular picture to resend ).

 

php.ini params

asp_tags = Off
display_errors = Off
max_execution_time = 240
max_input_time = -1
max_input_vars = 1000
memory_limit = 580M
post_max_size = 130M
session.gc_maxlifetime = 1440
upload_max_filesize = 80M
zlib.output_compression = On

php version = 5.6

Prestashop version 1.6.0.13

 

BTW. How does image upload process look like in prestashop? Durning upload prestashop makes an temp file with sizes of original one and cropped ones and then replace them with cropped with php GD ?

 

 

[shacker]

yes, theyre are cropped by gd. maybe is the image format, ext, etc.

 

i recommend to enable display errors and try to upload the images to see if have any error when uploading and post here