Broken images (plugin bug or api not returning product image url)

Plugin Version 1.5.4

Using search and selecting products for carosel. Products show images in search/plugin.

On rendering of page some products show broken images.
Inspecting source shows <img src=""... which makes me suspect that either

1. the API isn’t returning an image URL or
2. the plugin has a bug.

However the product/ASIN definitely has images that show up during searching and short-code generation step.

Question 1: How often does the plugin query the API for updated product meta-data (new images, new prices, availability, availability of prime shipping, new title, etc)?

Question 2: Is there a way to force a refresh of product meta data outside the schedule?

Question 3: Is this broken image issue a known bug? Any work arounds?

The problem for us is that serving product ads with broken images looks unprofessional and given that this can happen after posting due to API meta data update or the original image being deleted/moved… we don’t really trust this plugin yet but don’t want to have to resort to traditional links.

Looking forward to learning more.