press g key, see key repeat is slow. Press f key, then pressing g key means the key repeat is fast (broken).

reinitbug.py

"""
Manual test for pygame #2100

Press F to quit and restart the screen
"""

import pygame

#pygame.init() # <- problem doesn't happen at all with this

screen = pygame.display.set_mode([500, 500])
clock = pygame.time.Clock()

pygame.key.set_repeat(500,500)

while True:
    screen.fill((255,0,255))
    pygame.display.flip()

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            raise SystemExit

        if event.type == pygame.KEYDOWN:
            print(event)

            if event.key == pygame.K_f:
                pygame.display.quit() # <- works fine without this line
                screen = pygame.display.set_mode([500, 500])
                # pygame.key.set_repeat(500,500) <- no impact on result for pygame 2 - necessary to pygame 1

            if event.key == pygame.K_g:
                print(pygame.key.get_repeat()) # still returns (500, 500) after quit and init

    clock.tick(60)