I'm a digital marketing and work at a pretty large company that is lagging behind tech wise. We operate on Magento 2.3.4 and I work with our developers and a marketing agency in town.We use a custom theme in Magento. Our lead developer HATES Google Tag Manager with a passion. He says he spoke with a Magento rep/tech expert that says Magento 2.X.X has all sorts of issues with Google Tag Manager and that's why he doesn't want us using it. To me that sounds kind of ridiculous, is anyone aware of issues with Magento 2.X.X, custom themes and Google Tag Manager?