Your comments

give me your email please

may I sent you in private?

Yes. I'll keep it running anyway to see if it's still so frequent as was before or it's at least any better now.

$ xmrig -c config.json
 * VERSIONS:     XMRig/2.4.2 libuv/1.14.1 gcc/7.2.0
 * HUGE PAGES:   available, enabled
 * CPU:          Intel(R) Core(TM) i5-3320M CPU @ 2.60GHz (1) x64 AES-NI
 * CPU L2/L3:    0.5 MB/3.0 MB
 * THREADS:      2, cryptonight, av=1, donate=1%
 * POOL #1:      xmr.poolmining.org:3032
 * COMMANDS:     hashrate, pause, resume
[2017-11-17 07:21:08] use pool xmr.poolmining.org:3032 88.99.5.24
[2017-11-17 07:21:08] new job from xmr.poolmining.org:3032 diff 7500
[2017-11-17 07:21:12] accepted (1/0) diff 7500 (342 ms)
[2017-11-17 07:21:15] accepted (2/0) diff 7500 (341 ms)
[2017-11-17 07:21:19] new job from xmr.poolmining.org:3032 diff 7500
[2017-11-17 07:21:30] accepted (3/0) diff 7500 (340 ms)
[2017-11-17 07:22:07] speed 2.5s/60s/15m 30.1 n/a n/a H/s max: 30.6 H/s
[2017-11-17 07:22:10] accepted (4/0) diff 7500 (347 ms)
[2017-11-17 07:23:07] speed 2.5s/60s/15m 28.5 26.4 n/a H/s max: 30.6 H/s
[2017-11-17 07:23:30] no active pools, stop mining
[2017-11-17 07:23:36] use pool xmr.poolmining.org:3032 88.99.5.24
[2017-11-17 07:23:36] new job from xmr.poolmining.org:3032 diff 7500

Sorry, but it's still happens.