Contexts are not sending sometime

[rahulghodke191090]

why contexts(uuid) is not being sent with queryText sometimes from android ? I checked dialogflow history Raw interaction log, Weird behaviour :(
below is my request code block

window["ApiAIPlugin"].requestText({query: message, contexts : [ { name: "uuid", parameters: {
uuid: this.deveiceuuid } }]
},async(response) => {
console.log(response)
}, (error) => {
console.log(JSON.stringify(error)); // to pupup messages
});