New bug in function and refunction

[pwnchaser]

Hello,
I recently checked out https://github.com/naim-mr/refunction, the new version of function from SV-Comp26 and noticed that both function and refunction erroneously classify this program as terminating:

void f2();

void f1() {
  f2();
}

void f2() {
  while(1)
    ;
}

int main(void) {
  f1();
  return 0;
}

Meanwhile refunction does not expose anymore my previous bug report #19, so I believe this is a bug with a different root cause. Also this program does not have return statements that occur before the end of a function, so this might be something you want to look in.
Thank you!