[GreaseMonkey] Random freezes, mostly after switching to an another virtual desktop

[ghost]

After i've added a few userstyles with GreaseMonkey, QupZilla pages started to freeze randomly, mostly after switching to other virtual desktops and back (i'm using BSPWM as my window manager). Only the page gets frozen, it works again after hovering over the address bar. If i pressed some keys or scrolled on a frozen page, it takes effect immediately after the page starts working.

My system is ArchLinux, BSPWM, QupZilla 2.0.1, QtWebEngine version 5.7.0.

Exact links to userscripts installed if that helps:

• https://userstyles.org/styles/userjs/122072/Wikipedia%20Minimalistic%20Dark%20Material%20Design.user.js
• https://userstyles.org/styles/userjs/35345/Stackoverflow%20Dark.user.js?ik-syntax-theme=ik-tomorrownight&ik-bg-choice=ik-yes&ik-bg-options=ik-Tiled&ik-bg-attachment=ik-Scroll&ik-base-color=%234183C4&ik-visited-color=%234183C4&ik-font-choice=Source%20Code%20Pro&ik-bg-url=ik-default
• https://userstyles.org/styles/userjs/37035/GitHub%20Dark.user.js?ik-syntax-theme=ik-TomorrowNight&ik-bg-choice=ik-yes&ik-bg-options=ik-Tiled&ik-bg-attachment=ik-Scroll&ik-tab-size=ik-4&ik-code-wrap=ik-nowrap&ik-base-color=%234183C4&ik-font-choice=Source%20Code%20Pro&ik-bg-url=ik-default