OData gets different results

I have an odata service with an entityset Employee. I binded this entityset in my ui5 app in a table. Now the problem is that I get different sets everytime. When I test it in SAP GW, it works perfectly. I have 10 entries and everytime I call the get method, I receive all my 10 entries, but in my ui5 view, I get random entries. For example one time I get 7 out of 10, one time all of them, one time 5 out of 10 and so on. It is never the same. Do you know why this can happen?