Ampersands are removed from URLs when switching to a user

[IMcPwn]

Here is an example URL: https://www.example.com/checkout/order-pay/100/?pay_for_order=true&key=order_x82jhsx71

Then after switching the user the URL changes to: https://www.example.com/checkout/order-pay/100/?pay_for_order=true&user_switched=true

This breaks the location each time returning a 404 because the &key=order_x82jhsx71 is missing. I've looked at the code for quite some time and can't find out what is causing this.

Any help would be appreciated :)

[IMcPwn]

This looks to me like it may be caused by the abus_current_url function.

https://github.com/wpmark/admin-bar-user-switching/blob/master/admin-bar-user-switching.php#L16

[wpmark]

Thanks for reporting this @IMcPwn - I will take a look asap. I think the abus_current_url was used from somewhere else and therefore perhaps likely it could be the cause.