SN74HC74: About the simulation result of Tina9-TI

Part Number: SN74HC74
Other Parts Discussed in Thread: TINA-TI

About the simulation result of Tina9-TI

Timing simulation was performed on the attached signal generator circuit.
If I change the time axis setting on terminal VF4, a different waveform will appear.
The settings for 5ms and 6ms are different.
I don't know the reason, so please let me know.