Hreflang errors ignored by Polylang

Hi, I have the following hreflang errors with Polylang on thousands of pages on my website:

Missing reciprocal hreflang (no return-tag)
Self-reference hreflang annotation missing
Hreflang to non-canonical
X-default hreflang annotation missing
Links crawled and errors signaled by ahrefs site audit.
Also found by semrush website audit, but on a lower number of pages, because their free version only crawls 100 URLs.
Also identified by Website auditor v4.49.7
(Links to screenshots at the end of this message)

Permalink settings

Common Settings: https://www.the-travel-bunny.com/sample-post/
Optional:
– Product category base product-category
– Product tag base product-tag
Product permalinks: Custom base /product/
I am using a static front page.

Polylang settings

URL modifications
– The language is set from the directory name in pretty permalinks
– Hide URL language information for default language
– Remove /language/ in pretty permalinks
– The front page url contains the language code instead of the page name or page id
Detect browser language deactivated
Media activated
Custom post types and Taxonomies
– Custom post types: Products
– Custom taxonomies: Brands, Product categories, Product tags, Product shipping classes
Synchronization: Published date
WPML compatibility activated by default (no option to select otherwise)
Link to my site: https://www.the-travel-bunny.com/

I made sure WordPress, theme, Polylang, and all other plugins are the latest versions.
I didn’t find an answer on the forum, but several have reported the same issue and nobody answered.
I deactivated other plugins and switched to the default WordPress theme. Problem persisted.

Screenshots:
Ahrefs: https://prnt.sc/10sytv8
Semrush: https://prnt.sc/10syu4c
Website Auditor: https://prnt.sc/10syvw5