Fake packets loss at multiple parallel requests

[EvgenKo423]

Environment: Windows 7 SP1. ByeDPI v0.13.1+ at least.
Reproduce Steps:

1. Run proxy with ciadpi.exe -i 127.0.0.1 -H ":youtube.com ytimg.com ggpht.com" -s 4 -f -8 --fake-offset 4 -t <your_dpi_ttl>;
2. Start network capture, e.g. in Wireshark;
3. Open YouTube main page: https://www.youtube.com;
4. Inspect the capture.

Expected Result: Fake packets are always sent.
Actual Result:
Fake packets are lost at multiple parallel requests and connections are closed:

but according to log they were sent:

new event: fd: 220, evt: EV_ACCEPT, mod_iter: 0
accept: fd=308
accept: fd=304
accept: fd=312
accept: fd=316
new event: fd: 316, evt: EV_REQUEST, mod_iter: 267
new conn: fd=320, addr=64.233.163.198:443
new event: fd: 312, evt: EV_REQUEST, mod_iter: 267
new conn: fd=324, addr=64.233.163.198:443
new event: fd: 304, evt: EV_REQUEST, mod_iter: 267
new conn: fd=328, addr=64.233.163.198:443
new event: fd: 308, evt: EV_REQUEST, mod_iter: 267
new conn: fd=332, addr=64.233.163.198:443
new event: fd: 220, evt: EV_ACCEPT, mod_iter: 0
accept: fd=336
new event: fd: 336, evt: EV_REQUEST, mod_iter: 269
new conn: fd=340, addr=64.233.163.198:443
new event: fd: 320, evt: EV_CONNECT, mod_iter: 268
new event: fd: 316, evt: EV_DESYNC, mod_iter: 267
desync params index: 0
host: yt3.ggpht.com (127)
split: pos=0-4 (4), m: DESYNC_SPLIT
temp file: C:\Users\}!{enR\AppData\Local\Temp\t8397.tmp
split: pos=4-509 (505), m: DESYNC_FAKE
send: pos=509-517
new event: fd: 332, evt: EV_CONNECT, mod_iter: 268
new event: fd: 328, evt: EV_CONNECT, mod_iter: 268
new event: fd: 324, evt: EV_CONNECT, mod_iter: 268
new event: fd: 340, evt: EV_CONNECT, mod_iter: 270
new event: fd: 304, evt: EV_DESYNC, mod_iter: 267
desync params index: 0
host: yt3.ggpht.com (127)
split: pos=0-4 (4), m: DESYNC_SPLIT
temp file: C:\Users\}!{enR\AppData\Local\Temp\t83B7.tmp
split: pos=4-509 (505), m: DESYNC_FAKE
send: pos=509-517
new event: fd: 308, evt: EV_DESYNC, mod_iter: 267
desync params index: 0
host: yt3.ggpht.com (127)
split: pos=0-4 (4), m: DESYNC_SPLIT
temp file: C:\Users\}!{enR\AppData\Local\Temp\t83C7.tmp
split: pos=4-509 (505), m: DESYNC_FAKE
send: pos=509-517
new event: fd: 336, evt: EV_DESYNC, mod_iter: 269
desync params index: 0
host: yt3.ggpht.com (127)
split: pos=0-4 (4), m: DESYNC_SPLIT
temp file: C:\Users\}!{enR\AppData\Local\Temp\t83D8.tmp
split: pos=4-509 (505), m: DESYNC_FAKE
send: pos=509-517
new event: fd: 312, evt: EV_DESYNC, mod_iter: 267
desync params index: 0
host: yt3.ggpht.com (127)
split: pos=0-4 (4), m: DESYNC_SPLIT
temp file: C:\Users\}!{enR\AppData\Local\Temp\t83E9.tmp
split: pos=4-509 (505), m: DESYNC_FAKE
send: pos=509-517
new event: fd: 300, evt: EV_PRE_TUNNEL, mod_iter: 203
new event: fd: 296, evt: EV_TUNNEL, mod_iter: 201
new event: fd: 336, evt: EV_DESYNC, mod_iter: 269
close: fds=336,340, recv: 517,0, rounds: 1,0
new event: fd: 316, evt: EV_DESYNC, mod_iter: 267
close: fds=316,320, recv: 517,0, rounds: 1,0
new event: fd: 312, evt: EV_DESYNC, mod_iter: 267
close: fds=312,324, recv: 517,0, rounds: 1,0
new event: fd: 304, evt: EV_DESYNC, mod_iter: 267
close: fds=304,328, recv: 517,0, rounds: 1,0
new event: fd: 308, evt: EV_DESYNC, mod_iter: 267
close: fds=308,332, recv: 517,0, rounds: 1,0

On YouTube this error doesn't result in any broken images (probably, it retries), but on other sites it does.

[EvgenKo423]

Can someone have a look at this, please? Still happens on v0.15. Does this happen for anyone else?
Apart from broken images, this also slows down video preloading.