How to not lose all of the hearts when you touch the box

import pygame         
from sys import exit
import random

pygame.init()

WIDTH, HEIGHT = 800, 400
screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("My game!")
fps = pygame.time.Clock()
active = True

test_font = pygame.font.Font("letters.ttf", 50)
text_surface = test_font.render("Samad ge mig ett A!", False, (64,64,64))
text_rect = text_surface.get_rect(center = (400,50))

#game over
game_over = pygame.image.load("game_over.png").convert()

#Heart
heart = pygame.image.load("heart.png").convert_alpha()
heart = pygame.transform.rotozoom(heart,0,0.6)

#Box
box = pygame.image.load("box.png").convert_alpha()
box = pygame.transform.rotozoom(box,0,0.3)
box_rect = box.get_rect(midbottom = (300,305))

#Background och Ground
background = pygame.image.load("sky.png").convert()
ground = pygame.image.load("ground.png").convert()

#player PNG 
player = pygame.image.load("player.png").convert_alpha()
player = pygame.transform.rotozoom(player,0,2.5)
player_rect = player.get_rect(midbottom = (400,325))

#pickaxe PNG
pickaxe = pygame.image.load("pickaxe.png").convert_alpha()
pickaxe = pygame.transform.rotozoom(pickaxe,0,3.5)
pickaxe_rect = pickaxe.get_rect(center = (400,325))

#Gravity
player_gravity = 0
pickaxe_gravity = 0

hearts = 4

while True:
  for event in pygame.event.get():
    if event.type == pygame.QUIT:
      pygame.quit()
      exit()
  
    if active:
      if event.type == pygame.MOUSEBUTTONDOWN:
        if player_rect.collidepoint(event.pos) and player_rect.bottom >= 325: 
          player_gravity = -20
          pickaxe_gravity = -20
      
      if event.type == pygame.KEYDOWN:
        if event.key == pygame.K_LEFT or event.key == pygame.K_a:
          player_rect.x -= 20
          pickaxe_rect.x -= 20

        if event.key == pygame.K_RIGHT or event.key == pygame.K_d:
          player_rect.x += 20
          pickaxe_rect.x += 20
          
        if (event.key == pygame.K_SPACE or event.key == pygame.K_w or event.key == pygame.K_UP) and player_rect.bottom >= 325:
          player_gravity = -20
          pickaxe_gravity = -20
    else:
      if event.type == pygame.KEYDOWN and event.key == pygame.K_x:
        box_x = random.randint(10, 800)
        box_rect = box.get_rect(midbottom = (box_x,305))
        hearts = 4
        active = True
        
  if active:
    if player_rect.colliderect(box_rect): hearts-=1

    screen.blit(background,(0,0))
    screen.blit(ground,(0,300))
    
    if hearts == 0:
      active = False
    elif hearts == 1:
      screen.blit(heart, (35,35))
    elif hearts == 2:
      screen.blit(heart, (35,35))
      screen.blit(heart, (65,35))
    elif hearts == 3:
      screen.blit(heart, (35,35))
      screen.blit(heart, (65,35))
      screen.blit(heart, (95,35))
    else:
       screen.blit(heart, (35,35))
       screen.blit(heart, (65,35))
       screen.blit(heart, (95,35))
       screen.blit(heart, (125,35))
      
    screen.blit(box, box_rect)
    screen.blit(pickaxe, pickaxe_rect)
    screen.blit(player,player_rect)
    screen.blit(text_surface, text_rect)
    
    player_gravity += 1
    pickaxe_gravity += 1
    player_rect.y += player_gravity
    pickaxe_rect.y += pickaxe_gravity
    if pickaxe_rect.bottom >= 325: pickaxe_rect.bottom = 325
    if player_rect.bottom >= 325: player_rect.bottom = 325

    if player_rect.x <= -10 and pickaxe_rect.x <= -10:
      player_rect.x = -10
      pickaxe_rect.x = player_rect.x - 70

  else:
    screen.blit(game_over, (0,0))

  pygame.display.update()
  fps.tick(60)

Here is my whole code. I want it to whenever you touch the box you will use one heart only. But if i touch it now I loose all of the hearts imidiatelly. Pls help. I thinks it works correctly but whever I touch the box I lose 1 heart then another again and another without having time to get out of the box. Please help.

I tried to fix it but I was not able. I know what the problem is but im not able to fix it.