Video duplicate frame

If i load a video (hap) i have noticed some dropped and duplicate frames. This happen with almost every video files in an irregular fashion, in play, in frame by frame and also if i export video (i.e. frame 53, 59, 105, 117, 209, 234, 418, 443…). I’m working in 25fps, with 25fps video files, Notch Base.

I have uploaded at the link below a simple project with the problem, if anyone will give it a try…(i.e. go to frame 53)

Any suggesion? thanks