toggling default menu in electron with keyboard shortcuts not working

[splintercell9]

I'm new to electron. So, I loaded a simple html document on the mainWindow but the problem is when i had to reload page using Ctrl+R it's not working same with all other options under Window menu. And its quite irritating to reload again and again or using dev tools with mouse. Electron version. 4.0.1

Edit: I created custom menu with accelerator for dev tools 'Ctrl+Shift+I' its working but with default menu by electron accelerator is not working