Approximately every week permalinks are lost for custom post types in multisite

[Lauriate]

I have to check my site ​https://6teamconditions.com/ multiple times a day as it will randomly just loose the permalinks for custom post types and will return a 404.

I have deactivated security and cache plugins and still have same behaviour.

There are no errors logged, I can not find any event that is causing this.
I have used the same theme method for creating custom post types on hundreds of normal (non multisite) wordpress sites over many years without ever having this problem.

The site has had this problem since going live in December, wordpress has been updated to latest version each time.

I have been posting in the support forum with no luck
​https://wordpress.org/support/topic/permalinks-disapear-for-custom-post-types/#post-12332300

Example log of error 404 on website ​https://6teamconditions.com
135.180.133.34 - - [17/Feb/2020:01:14:55 +0000] "GET /podcast/episode-002-the-6-conditions-framework/ HTTP/2" 404 6464 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.100 Safari/537.36"

[Lauriate]

Litespeed log file parts twice showing the problem occuring

[Lauriate]

.htaccess file of site

[Lauriate]

wp-config.php of site redacted db logins