Good day!

I am new to Amplitude and still learning. Our organization’s current objective is to track specific webpages that have high exits/drop-offs so we think that the Funnel Chart is the best tool to use for it. However, you see our website uses 2 different domains in completing the buying journey of visitors (from product browse to payment. Below is our current buying funnel:

1. Homepage 2. Product Information 3. Privacy Declaration 4. Forms for Personal Information 5. Summary of Payment 6. Checkout Page 

The numbers 1, 2, and 6 have the same domain (Shopify) while 3, 4, and 5 are a custom application with a different domain that our 3rd party vendor made. The first problem that we encountered is that Amplitude cannot track the events inside the custom application so it appeared that the visitor went from 1, 2, to 6 suddenly but our developer already fixed this.

Now, Amplitude can now see the events for the custom application but is not counting the number of visitors:

the bars inside label 2 is the custom application pages that has different domain vs. pages inside label 1.

If you can notice, the chart is telling that there are 0% conversion from Home Page to the last Application Form page but this is not true since our team members are doing test from start to finish so there should be numbers reflected there. 

I tried creating a funnel chart that only contains the pages inside the custom application and yielded accurate results so far, so why is it that we still cannot track the numbers from Domain 1 to Domain 2?

I also noticed that the Device ID changes whenever a visitor is redirected to the custom application domain, is this what causes Amplitude to not track the visitor’s entire funnel/pages visited? 

Please observe the Device ID of the visitor coming from Domain 1

Then it changes when the visitor is redirected to Domain 1 (Custom Application)

Is there a workaround so we can track the entire customer journey via Amplitude even though the Device ID changes?

Thanks a lot! Please do let me know if I need to supply more information.