Kobo Online Submission via Android

When we try to enter the data in Kobo via Online Link (Enketo) it is slower in few questions where the choice is based on relevant. Like for eg: i have Q1 where the filter is if 1 is selected in Q1 then Q2 to Q30 should be displayed. In this case when 1 is selected in Q1 it takes time for the selection to appear in desktop or pc and in android it is more slower than desktop.
Why is that because in Kobocollect app it works perfectly fine, is there any issue of performace with Enketo Online Link to be worked in Android?

@santro, what is the total number of choices the questions has which is taking time while loading the form in Enketo?