Time depends on fps

I use the time input node in a blueprint material. But I now suddenly notice that time is not progressing constant any more. Especially it seems to depend on FPS. On a small screen, I get very high FPS ~90. And the time seems to be at a frequency of 2Hz, but when I go to full screen, I get much lower FPS and it is more around 0.5 Hz.

Is there some option somewhere that ties the rate of time to the draw refresh rate?

OK, I found the problem. The last time I used UE, I made a video and I set the framerate fixed to 30FPS. You can change this setting at: Project Settings → Engine → General Settings → Use Fixed Frame Rate.

Dude you saved me