Militarnyi reports that yesterday, three civilian ships (Israelian, Greek and Turkish/Georgian origin) were able to bypass the Russian blockade of the Black Sea and headed for Ukraine. It is reported that the passage was secured by a US P8 anti-ship aircraft.
Yes, there were reports recently of manned serveilance aircraft being subjected to wake turbulence. I think there were other incidents in addition to this report.
Citing unidentified US officials, The Associated Press news agency also reported last week that a Russian jet flew dangerously close to a US surveillance aircraft over Syria on July 16, “putting the lives of the four American crew members in danger”.