GIVEN section in a function not executed

**Describe the bug**
In a BDD style test, a GIVEN section in a function isn't always executed.
Its execution depends on the function parameters used in the string passed to the GIVEN macro.
Removing the GIVEN macro appears to fix the bug.

**Expected behavior**
Every test should be executed.
The first two should pass and the last two should fail.

**Reproduction steps**
Execute the MWE below without any additional flags.
```
#define CATCH_CONFIG_MAIN
#include
#include

auto test_func(bool flag1, bool flag2){
//with this string all tests will be executed
//GIVEN("Flag1 = " + std::to_string(flag1) + " and Flag2 = " + std::to_string(flag2)){

//with this string only the first two tests are executed
//GIVEN("Flag1 = " + std::to_string(flag1)){

//with this string only the first test is executed
GIVEN("Something"){
if (flag2 == true) REQUIRE(true);
else REQUIRE(false);
}
}

SCENARIO("Testing a function with 2 parameters."){
test_func(true, true);
test_func(false, true);

test_func(true, false);
test_func(false, false);
}
```

**Platform information:**
- OS: **Linux 5.10.10-arch1-1**
- Compiler+version: **GCC v10.2.0 & Clang v11.0.1**
- Catch version: **v2.13.4 & v2.12.4**

**Additional context**
Initially, my application with the same structure crashed with the message "Assertion `m_parent' failed".
While trying to create a MWE, I noticed this odd behavior.
Removing the GIVEN section always seems to fix the problem.

I suspect this might not be the intended use of the GIVEN macro, but I couldn't find any contrary information in the docs.
However, using it this way removes a lot of boilerplate test code for me.
I am fairly certain the function is called and it appears that only the GIVEN section is not executed.