Strobes too fast

Hi everyone, I love flying at night! But since a few days, the strobes both of my planes and my AI-Traffic are flashing and blinking way too fast. Only if I set the simulator-speed to 1/4 it approxiamtely looks like it did before...any suggestions how to solve this problem? another thing: my (P)AI-Planes are flying with their lights switched on even on daytime. Thanks!