Same issue… disabled SiteGround Optimizer and credit card box reappeared on mobile devices.
EDIT: After further trial and error, Disabling this specific option in SG Optimizer resolved the issue:
Defer Render-blocking JavaScript
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This reply was modified 2 years, 1 month ago by csdstudio78.
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This reply was modified 2 years, 1 month ago by csdstudio78.