Pleasure, honestly every business has bugs, it’s just the realities of apps, plugins and businesses. My advice is to simply not use the free app. While Shopify is great, it is just not very focused on creating an app that is feature-rich or a dedicated team that works on the app (not that I am aware of).
Compared to a 3rd party paid app, it is their main business, so support is generally better, and issues get fixed, within a reasonable amount of time. If they don’t improve their business, they are out of work 
So you got to have great customer support. Ofcourse I can’t speak for every business, but the apps that I use for my clients, have good support.