Thanks for your reply. I tried your links in order to report the bug via email, but only "EA answer hq" appears as contact way for bug reporting: http://help.ea.com/en/contact-us/new/?product=need-for-speed-rivals&platform=pc&subject=Keyboard+stops+randomly+working&category=report-a-bug&issue=report-bug
When the game stopped responding to the keyboard, the only way to continue is to kill it via task manager. But as the progress is only saved in hideouts/command posts, all speed points since the previous visit are lost. As cop, i could mitigate the problem by returning to the command post after every won event, but as racer your multiplicator is reset when you return "home" for saving.
Here is my UOTrace if it is important:
Host Name IP Address Hop Ping Time Ping Avg % Loss Pkts r/s Ping best/worst
* Unknown Host * 217.0.119.252 2 436ms 100% 0 / 21
* Unknown Host * 87.186.203.10 3 191ms 278ms 0% 21 / 21 164ms / 450ms
f-ed3-i.F.DE.NET.DTAG.DE 62.154.15.6 4 210ms 289ms 0% 21 / 21 179ms / 475ms
* Unknown Host * 80.157.129.250 5 244ms 100% 0 / 21
ae-21.r02.frnkge03.de.bb.gin.ntt.129.250.6.84 6 256ms 337ms 0% 21 / 21 217ms / 507ms
* Unknown Host * 212.119.27.190 7 232ms 317ms 0% 21 / 21 126ms / 515ms
unknown.prolexic.com 72.52.48.200 8 237ms 311ms 0% 21 / 21 83ms / 522ms
unknown.prolexic.com 72.52.48.207 9 240ms 308ms 0% 21 / 21 85ms / 501ms
* Unknown Host * 93.191.173.50 10 564ms 100% 0 / 20
unknown.prolexic.com 209.200.168.132 11 361ms 423ms 0% 20 / 20 174ms / 603ms
* Unknown Host * 159.153.93.2 12 415ms 100% 0 / 20
* Unknown Host * 159.153.225.30 13 279ms 364ms 0% 20 / 20 271ms / 520ms