Will magnetic stripe cards in this case be damaged by wireless charging?

[arunma]

It's fairly well known that credit cards can be damaged if placed between a phone and a wireless charger, which is something to remember when using wallet or credit card cases with our wireless charging phones. However, I'm wondering at what proximity this effect becomes negligible. It's not an academic question, I recently bought the following case for my pre-ordered Galaxy S8+:

https://www.amazon.com/gp/product/B06XP4YK3V/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

Unlike most cases I've owned, this one keeps the cards above the phone rather than below, meaning the cards are going to see a much smaller magnetic field from the charging pad (but still some field from the current loop inside the phone). What I'm wondering is whether it's safe to leave my credit cards in this case when wirelessly charging my phone? Has anyone done this with a similar style of wallet case? If so, what was your experience?

Thanks in advance.