Simulation in DipTrace 5.0

I have created a schematic, see the attached screenshot. Now I am trying to simulate how it works in a digital SPICE simulator (built-in DipTrace 5.0 beta).

In general, it works almost reasonably. But there are strange signal distortions on some outputs of U3 on each falling edge of the clock coming to the input of decade counter U5. I have shown the problem with red marks.

What I am doing wrong? Is it a simulator issue or the schematic is incorrect?

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Hi @RenoX and welcome to our forum.

If you think this is a problem with simulator, I would recommend that you contact their support directly to check this.

But more likely there is some problem with the schematics.

Is this something for a robotics project?