It seems I recognize some of you guys from the forum sometime back, so maybe there is something similar about our systems.
I've also had more dropouts since the 2017.5 update.
In addition, I get an "Out of Memory" Prompt from time to time. If I restart Sonar, the problem, more times than not, is resolved. On another occasion I was making a master wav file and I noticed drop outs or glitches more than in the past. When I set the buffer to 1024 to eliminate the drop outs, the transport would not start. The same with 2048. But, When I close and reopen Sonar I can get the transport to work. In general, I have had to use a higher buffer setting than before the update on some projects, but not all projects.
i7-6700 @3.40GHz 16GB RAM - Steinberg UR44 - Novation Impulse 61 - JBL LSR308 Monitors - Sonar Platinum 64 & 32 - Harmor - Rapture Pro - GPO - Harmless - Z3TA 2 - Octopus - Primary vocal and voice mikes: AT4040 and Cad VSM-1 Tube. Studio type: Open windows, birds, and next to a railroad track.