SDL_ttf display glitches

Question

I'm trying to display the string "hey" using a true type font in SDL, but there are glitches. Here is the text as it should appear (I took a screen recording, so the lower part in this shot is just the control for the video player):

And here it is with a glitch:

As you can see the upper part of the letter "h" is missing.

Here is the code that I used:

#include <SDL2/SDL.h>
#include <SDL2/SDL_ttf.h>
#include <iostream>
#include <string>

int fatal( std::string m ) {
    std::cout << "Fatal error: " << m << "\n";
    exit(-1);   
}

void drawText(TTF_Font* font,SDL_Renderer* r, std::string message) {
    SDL_Color c = {255,255,255,255};
    SDL_Surface *temp = TTF_RenderText_Blended( font, message.c_str(), c);
    if ( temp == NULL )
        fatal("failed to create surface");
    SDL_Texture *txt = SDL_CreateTextureFromSurface( r, temp );
    if ( txt == NULL )
        fatal("failed to create texture");
    SDL_FreeSurface( temp );
    SDL_Rect src;
    src.x = 0;
    src.y = 0;
    SDL_QueryTexture( txt, NULL, NULL, &src.w, &src.h );
    SDL_Rect pos;
    pos.x = 80;
    pos.y = 80;
    pos.w = src.w;
    pos.h = src.h;
    if ( SDL_RenderCopy(r,txt,&src,&pos) != 0)
        fatal("SDL_RenderCopy failed");
    SDL_DestroyTexture(txt);    
}

extern "C" int main( int argc, char** argv ) {
    SDL_Renderer *renderer;
    SDL_Window *window;
    if ( SDL_Init( SDL_INIT_VIDEO ) != 0 )
        fatal("sdl_init failed");
    if ( TTF_Init() != 0 )
        fatal("ttf_init failed");
    if ( SDL_CreateWindowAndRenderer ( 200, 200, 0, &window, &renderer ) != 0 )
        fatal("sdl_createwindowandrenderer failed");
    TTF_Font* font = TTF_OpenFont( "Arial.ttf", 30 ); 
    if ( font == NULL ) 
        fatal("failed to open font");
    SDL_Event e;
    while ( 1 ) {
        if ( SDL_PollEvent(&e) ) {
            if (e.type == SDL_QUIT)
                break;
        }
        // clear back buffer
        SDL_SetRenderDrawColor(renderer,0,0,255,255);
        SDL_RenderClear(renderer);  
        drawText(font,renderer,"hey");
        SDL_RenderPresent(renderer);
    }
    
    return 0;
} 

Which I compiled on macOS 10.15.6 using the following command

g++ -std=c++17 textTest.cpp -lSDL2 -lSDL2_ttf