Cart widget not darkening the rest of the screen and not closing automatically

The fact is that I have a long version of the theme 6.0.4.
The problem has not disappeared.

Yes, that’s right. I have 6.0.4.
The problem persists.
I can grant access to your developers, but I can’t disable anything. Since this site belongs to a large production company. The site sells drinking water around the clock. Now everything works there as it is necessary for the owners of the enterprise, except for what I listed in the first message. And these problems appeared immediately after the theme update. If I disable something on the site now and sales stop, the company will start losing profits, and I will be hung by my eggs on the nearest tree 🙂 I hope you understand.
I also have to say that I wrote a lot of my own styles and functions for this client. Therefore, the site has a child theme.
Alternatively, I can make a full copy of the site, along with the database, and provide it to you so that you can deploy the site locally and identify the cause of the problems. I can make a copy with the Duplicator plugin.
Is this option suitable for you? What do you say?

Today I will copy the site to a technical domain and give you unlimited access to a copy of the site.

A technical domain is a test domain.
It will look like this: vcrist8y.beget.tech

I apologize for my crooked English.

I deployed a copy of the site.
You can disable and check anything there.
The main thing is that you help to sort out the problems that have arisen. And that everything works as before-well. Like on your demo site https://woodmart.xtemos.com/
Namely: adding a product to the cart (pop-up widget on the right and darkening); authorization/registration in the profile (pop-up widget on the right and darkening); as well as the mobile menu-now it opens, but there is no darkening and it does not disappear if you click on the area next to it.
On version 5.3.6, all this worked fine.

P.S. For clarity, I even recorded a short video.

P.S. Right now, the shopping cart and registration/authorization widgets generally work very strangely. They used to at least appear, and now they don’t even appear.

Yes, indeed on the technical site it started working correctly.
I did as you said on the main site and nothing works there.
Everything is as it was. The mobile menu appears, but there is no blackout. And the menu is not hidden after clicking on the area next to it.
The same goes for the bucket widget.

Please describe all the actions that you did on the test site.

I just noticed that some of my custom functions don’t work. For example, recalculating the price in the shopping cart.
I suspect that you have disabled the child theme. And I can’t disable it on the main site. There are a lot of necessary fixes and additions.

I remind you that all the problems started only after the update to version 6+. Before that, I was quietly updating in the 5+ branch and everything was fine. Moreover, I had a child theme installed from the very beginning. And all the main improvements and custom styles I did BEFORE the update to 6+.

In addition, I see that you have disabled almost all plugins. Do you suggest that I switch to the parent theme on my work site and turn off most of the plugins? Seriously? And send all my site’s customers to competitors? And close my business?

Just now, on the test site, I turned back on the child theme. But I left the plugins turned off.
And everything works well. So the reason for the errors is in some plugin.
Some plugin is causing a conflict.
Let’s just figure out which plugin is interfering with normal operation?

I’ve done everything you’ve written. And obviously, the problem is not with plugins. The problem is in the child topic.
The fact is that when I activated the child theme and all the plugins, the basket widgets and the mobile menu only work correctly on the main page.
On the other pages, the problem persists.
When I turn off the child theme and switch to the parent theme, everything works correctly on other pages.
Very strange behavior.

For clarity, I recorded a video.

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