Please See Video Below. It seems as if the Shopify Tags and Updating Customer has broken. Been running the same code for almost two years and all of a sudden, I see how the Tags are Garbled now. Perhaps Shopify made some API changes that Make needs to update?
You should do the formula this way. Because the first module output i.e. Tags are already in an Array Format hence no need to use EmptyArray.
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Thanks so much for the Solution, but still get the same results. Tags are still not divided and still are all on one single line.
Dear, you must create an array to send tags. Every item field in tags only accepts one string as tag. Not comma or anything else will works. So create a array before this step and map the tags to use this array.
Thanks, Helio!
Wemakefuture
If you have questions reach out 
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Ok all working now. I forgot to turn on the Map switch. Thanks so much.