I'm a fan of Opera GX as many of you. For me it's the most cozy, stylish and fast browser ever. For many years I've used standard Opera, but now, only GX.

Till yesterday I didn't use social networks that are located in a sidebar. I decided to start using it. And... I found out such an annoying thing, VK social network doesn't play sound notification of new messages.

For example, I also connected with my WhatsApp account, and it works just fine, plays a sound, shows notification with the message when a new message arrives. What's wrong with VK? It only shows a circle of a new message on the icon and that is all, no pop-up, no sound.
I can't tell did it worked before or not, cuz I've just started to use it, but it's kinda weird.

I'm not just a regular user, I tried many things:
— In VK sidebar app I checked in settings and Enabled all about notifications, everything is Enabled.
— In Opera "Site Settings" - "Notifications" - all notifications are allowed, and also added as exclusion of allowed notifications address https://m.vk.com:443
— Javascript is also allowed in Opera settings
— I thought, maybe third-party software is making this issue. I have on my laptop installed Kaspersky Total Security and Adguard for Windows 7.6.1.
I've turned them all off, nothing. Also checked Adguard maybe it has some filters on VK enabled, nope.
— I started to dig further. Turning off all installed extensions in Opera GX, nothing.
— In despair already, I deleted Opera GX completely from my laptop, cleaning all leftovers, such as folders/files and registry recordings. I did a Clean installation of Opera GX again, and with disabled antivirus, disabled adguard, and with 0 extensions first of all I tried to check if VK social network in sidebar works... Nope! Still the same. No sound of new messages.

Jesus Christ, what else can I do to fix this issue? Does anybody else use VK social network in sidebar? Or anybody have/had same issue as me?

Opera GX is updated. Version is LVL 3 (core: 77.0.4054.298)