A few updates on this:- We don't have a request ID since we're using the shopify_api gem and I couldn't find how to get this ID from the response body- Randomly, tags are refused by Shopify. When it happens, it’s only refused the first time, upon rep...

I'm facing the exact same issue when I try to update the customer's tags. I have created a post about it in this community as well and I'm still waiting for a proper response from Shopify Support. 

I'm facing the exact same issue when I try to update the customer's tags. I have created a post about it in this community as well and I'm still waiting for a proper response from Shopify Support. 

This issue is very similar to this one [Bug][Admin GraphQL] updateOrder fails with "Order tags is invalid"  First of all, Shopify's docs are a bit confusing. It marks tags as [String!], docs here Input scheme also marks tags as an array of strings:Th...