Lately we have a lot of duplicated ticket issues while creating a ticket request via WS using a frontend http.
The reason of the duplicating tickets i have no clue what could be as we don´t try with F5 or refreshing the page once we receive internal server error. Meanwhile...OTRS is creating the tickets (5) for the same request.
What we have realized is that the tickets failing are including an attachment(usually 1Mb or more)
Creating using phone ticket or customer frontend is working fine, but using WS is not.
Do you have any advice?

Thank you