I noticed something odd today. Can someone explain what's going on here ?

1. Text Spoiler

Normal Spoiler

Spoiler without closing tag

Text outside spoiler.

Spoiler without closing tag

Normal Spoiler

Also, how do you put code in a spoiler ? It no longer works the way it used to I think.

2. Code Spoiler

#include <bits/stdc++.h>
using namespace std;

int main(){
    return 0;
}

Here are some images for the plain text I used.

During the past contest, I kept getting logged out of my account after a few minutes(based on inactivity I guess?) despite having Codeforces tabs open. Since I had to switch to my IDE for upto 20 min at a time to work on a problem, it was a bit annoying to have to login multiple times over the duration of a contest.

Is there a workaround for this?