Hello,
after deactivating and reactivating plugins one by one I’ve found that XStore Core causes AH01075 AH01067 errors.
https://prntscr.com/1004bul – no errors
https://prntscr.com/1004d5l – errors
PHP time limit: 180
ProxyTimeout 1800
It can be reproduced by testing the shop page on “PageSpeed Insights”
I experience time to time slow speed, 503 error and “Secure Connection failed”. I’m not aware if there problems are connected XStore Core plugin.
Kind Regards!