p.s. here is a log of the symptoms:
64 bytes from 8.8.8.8: icmp_seq=440 ttl=116 time=23.221 ms
64 bytes from 8.8.8.8: icmp_seq=441 ttl=116 time=22.795 ms
64 bytes from 8.8.8.8: icmp_seq=442 ttl=116 time=23.112 ms
64 bytes from 8.8.8.8: icmp_seq=443 ttl=116 time=23.530 ms
64 bytes from 8.8.8.8: icmp_seq=444 ttl=116 time=23.695 ms
64 bytes from 8.8.8.8: icmp_seq=445 ttl=116 time=117.110 ms
64 bytes from 8.8.8.8: icmp_seq=446 ttl=116 time=149.660 ms
64 bytes from 8.8.8.8: icmp_seq=447 ttl=116 time=39.162 ms
64 bytes from 8.8.8.8: icmp_seq=448 ttl=116 time=144.834 ms
64 bytes from 8.8.8.8: icmp_seq=449 ttl=116 time=23.192 ms
64 bytes from 8.8.8.8: icmp_seq=450 ttl=116 time=22.655 ms
64 bytes from 8.8.8.8: icmp_seq=451 ttl=116 time=23.357 ms
64 bytes from 8.8.8.8: icmp_seq=452 ttl=116 time=23.391 ms
64 bytes from 8.8.8.8: icmp_seq=453 ttl=116 time=22.757 ms
64 bytes from 8.8.8.8: icmp_seq=454 ttl=116 time=23.579 ms
64 bytes from 8.8.8.8: icmp_seq=455 ttl=116 time=22.361 ms
64 bytes from 8.8.8.8: icmp_seq=456 ttl=116 time=22.755 ms
64 bytes from 8.8.8.8: icmp_seq=457 ttl=116 time=23.041 ms
64 bytes from 8.8.8.8: icmp_seq=458 ttl=116 time=23.388 ms
64 bytes from 8.8.8.8: icmp_seq=459 ttl=116 time=23.077 ms
64 bytes from 8.8.8.8: icmp_seq=460 ttl=116 time=101.910 ms
64 bytes from 8.8.8.8: icmp_seq=461 ttl=116 time=153.250 ms
64 bytes from 8.8.8.8: icmp_seq=462 ttl=116 time=24.132 ms
64 bytes from 8.8.8.8: icmp_seq=463 ttl=116 time=27.386 ms
64 bytes from 8.8.8.8: icmp_seq=464 ttl=116 time=23.307 ms
64 bytes from 8.8.8.8: icmp_seq=465 ttl=116 time=23.609 ms
64 bytes from 8.8.8.8: icmp_seq=466 ttl=116 time=23.084 ms
64 bytes from 8.8.8.8: icmp_seq=467 ttl=116 time=23.229 ms
64 bytes from 8.8.8.8: icmp_seq=468 ttl=116 time=23.405 ms
64 bytes from 8.8.8.8: icmp_seq=469 ttl=116 time=22.490 ms
64 bytes from 8.8.8.8: icmp_seq=470 ttl=116 time=23.186 ms
64 bytes from 8.8.8.8: icmp_seq=471 ttl=116 time=23.531 ms
64 bytes from 8.8.8.8: icmp_seq=472 ttl=116 time=22.867 ms
64 bytes from 8.8.8.8: icmp_seq=473 ttl=116 time=23.418 ms
64 bytes from 8.8.8.8: icmp_seq=474 ttl=116 time=182.539 ms
64 bytes from 8.8.8.8: icmp_seq=475 ttl=116 time=67.436 ms
64 bytes from 8.8.8.8: icmp_seq=476 ttl=116 time=113.186 ms
64 bytes from 8.8.8.8: icmp_seq=477 ttl=116 time=137.201 ms
64 bytes from 8.8.8.8: icmp_seq=478 ttl=116 time=276.346 ms
64 bytes from 8.8.8.8: icmp_seq=479 ttl=116 time=22.116 ms
64 bytes from 8.8.8.8: icmp_seq=480 ttl=116 time=22.167 ms
64 bytes from 8.8.8.8: icmp_seq=481 ttl=116 time=22.033 ms
64 bytes from 8.8.8.8: icmp_seq=482 ttl=116 time=22.379 ms
64 bytes from 8.8.8.8: icmp_seq=483 ttl=116 time=23.241 ms
64 bytes from 8.8.8.8: icmp_seq=484 ttl=116 time=22.233 ms
64 bytes from 8.8.8.8: icmp_seq=485 ttl=116 time=22.602 ms
64 bytes from 8.8.8.8: icmp_seq=486 ttl=116 time=23.379 ms
64 bytes from 8.8.8.8: icmp_seq=487 ttl=116 time=22.682 ms
64 bytes from 8.8.8.8: icmp_seq=488 ttl=116 time=22.401 ms
64 bytes from 8.8.8.8: icmp_seq=489 ttl=116 time=102.160 ms
64 bytes from 8.8.8.8: icmp_seq=490 ttl=116 time=179.274 ms
64 bytes from 8.8.8.8: icmp_seq=491 ttl=116 time=218.303 ms
64 bytes from 8.8.8.8: icmp_seq=492 ttl=116 time=149.457 ms
64 bytes from 8.8.8.8: icmp_seq=493 ttl=116 time=22.297 ms
64 bytes from 8.8.8.8: icmp_seq=494 ttl=116 time=22.110 ms
64 bytes from 8.8.8.8: icmp_seq=495 ttl=116 time=23.379 ms
64 bytes from 8.8.8.8: icmp_seq=496 ttl=116 time=23.627 ms
64 bytes from 8.8.8.8: icmp_seq=497 ttl=116 time=28.800 ms
64 bytes from 8.8.8.8: icmp_seq=498 ttl=116 time=23.928 ms
64 bytes from 8.8.8.8: icmp_seq=499 ttl=116 time=23.431 ms
64 bytes from 8.8.8.8: icmp_seq=500 ttl=116 time=23.471 ms
64 bytes from 8.8.8.8: icmp_seq=501 ttl=116 time=23.622 ms
64 bytes from 8.8.8.8: icmp_seq=502 ttl=116 time=22.837 ms
64 bytes from 8.8.8.8: icmp_seq=503 ttl=116 time=72.227 ms
64 bytes from 8.8.8.8: icmp_seq=504 ttl=116 time=106.732 ms
64 bytes from 8.8.8.8: icmp_seq=505 ttl=116 time=150.171 ms
64 bytes from 8.8.8.8: icmp_seq=506 ttl=116 time=22.739 ms
64 bytes from 8.8.8.8: icmp_seq=507 ttl=116 time=23.745 ms
64 bytes from 8.8.8.8: icmp_seq=508 ttl=116 time=23.244 ms
64 bytes from 8.8.8.8: icmp_seq=509 ttl=116 time=23.575 ms
64 bytes from 8.8.8.8: icmp_seq=510 ttl=116 time=25.170 ms
64 bytes from 8.8.8.8: icmp_seq=511 ttl=116 time=51.001 ms
64 bytes from 8.8.8.8: icmp_seq=512 ttl=116 time=26.533 ms
64 bytes from 8.8.8.8: icmp_seq=513 ttl=116 time=22.221 ms
64 bytes from 8.8.8.8: icmp_seq=514 ttl=116 time=22.658 ms
64 bytes from 8.8.8.8: icmp_seq=515 ttl=116 time=23.313 ms
64 bytes from 8.8.8.8: icmp_seq=516 ttl=116 time=23.074 ms
64 bytes from 8.8.8.8: icmp_seq=517 ttl=116 time=106.828 ms
64 bytes from 8.8.8.8: icmp_seq=518 ttl=116 time=129.065 ms
64 bytes from 8.8.8.8: icmp_seq=519 ttl=116 time=148.235 ms
64 bytes from 8.8.8.8: icmp_seq=520 ttl=116 time=32.353 ms