Redstone clock creating a buggy signal

This observer clock that I came up with creates a buggy redstone signal:
The redstone is not getting bright red even when it is active.
First i thought this is a 0-tick pulse but then I found out some other weird things.

1. The observer in front of the piston never gets left behind like it would with a 1 tick pulse
2. When I ran the signal into other pistons they didn't activate
3. Doors/Gates make the opening sound but don't open.

The other redstone components seem to behave normally

This was a very weird behaviour and I believe it is not intended.

I found 2 clock desings that produce this buggy redstone

 

This bug is (at least) since version 1.14.2