Page load delays traced to uncached/unbatched queries in theme code

Hello,

We're seeing significant load times on our site ([Links visible only for registered users]) — 3.5 to 15+ seconds per page, including plain wp-admin pages. Database time itself is low (under 1 second); the delay is in PHP execution. A single page load can generate ~8,000 database queries, ~98% of which Query Monitor flags as exact duplicates.

Using Query Monitor's "Duplicate Queries" view (with third-party plugins disabled via troubleshooting mode, to rule out plugin conflicts), we traced two theme-specific causes:

1. Header menu built twice, uncached between renders

update_meta_cache() for the same set of menu-item post IDs runs 4 times per page load (0.82s total), attributed to sc_header_menu() and sc_header_burger(). It looks like desktop and mobile menu rendering each independently re-fetch the full menu meta instead of sharing one cached result.

2. Attachment/thumbnail meta fetched one image at a time

Each course-grid thumbnail triggers multiple separate queries (WP_Post::get_instance(), update_meta_cache() via mfn_get_attachment_data(), has_post_thumbnail(), get_post_thumbnail_id()) instead of a single batched update_meta_cache() call for all attachment IDs before the loop — with 30+ images this multiplies into hundreds of small queries.

Questions:

• Is this a known issue, and is there a fix/updated version that batches menu and attachment meta lookups?
• Any setting to make BeTheme prime the meta cache for a full post/attachment batch upfront rather than per item?

Happy to share full Query Monitor exports if useful. Thanks in advance.