Remove button is not working and behaves strangely

Hello!

I apologize for my English.

Problem: Remove Item button after a short time not working and begins to behave strangely.

On the basket page, goods are either not deleted or the basket disappears.
On Product page or Archive in minicart, when deleting, goods are either not deleted or occurs redirect.

All this does not happen immediately. Several times the deletion can work, but then it all starts happening.

No errors (‘WP_DEBUG’, true), no warnings in the browser console.

But there is one strangeness in tabs Network:

I tried to disable all plugins, all scripts, all custom snippets – does not help. I changed themes – also without results.

On other sites this has never happened.

Site: https://shop.opttour.ru/

I will be grateful for any help!