There seems to be a number of users abandoning surveys.
By the way: This is completely normal. Depending on your target group and the way you invite/recruit these respondents, the drop-out rate can be very high.
Just to give you an example: I know of a project where people are recruited via an invitation on different websites of brands. This invitation randomly appears to a certain % of the visitors and only on certain pages.
From seeing the invitation, over clicking on the link, starting the survey and finishing the survey we can often see drop-out rates of over 90%.
Once respondents are in the survey and have responded 1-2 questions the dropout rate drops considerably. But there are still certain parts that trigger more dropouts (e.g. open ended questions, long item batteries, etc.).
I would rather have a look at my questionnaire, especially at the questions where people drop out. What often happens is that the right answer option is not there and people drop out because of that, or the question is tedious, annoying, doesn't make sense to them, etc.