Odd Periapsis ETA Timings?

[DaveSteadman]

Here I have my Moho-Explorer probe braking towards the inner solar system. The ion drive is running and I have the mouse over the periapsis, watching the ETA reduce:

In the screenshot the ETA has a value of four hours. When it reduces to zero, the day will decrement and the hours values will goes back to a sub-five hour value.

At no point does a value above 5 hours get reported. Is this a known thing?

Thanks.

*Edit*

Mac, no mods, v0.25:

[Padishar]

Do you actually mean "no time above 6 hours"? This is expected as the Kerbin day is only 6 hours. There is an option in the settings that lets you change all the game displays from the Kerbin 6 hour days to the Earth 24 hour days.

[DaveSteadman]

That would answer it! Thanks.