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If you use the Schema WordPress plugin, it may be that you have breadcrumbs enabled. Martha van Berkel, a founder, helped me troubleshoot a similar issue and we resolve them by turning off breadcrumbs. It seems that some JS can cause odd behavior. I believe it works better to add schema via the GTM. SEMrush is tops at establishing your website's health, but cannot diagnose some of these happenings (no one service can). Your site relies on quite a few plugins - I wish you the best. I do audits; let me know how I can help you.