Cruise Alt increases by 1000ft every time skip

Long haul flight from Tokyo to Honolulu I have selected FL370 for cruise alt. Mcdu alt changed from 37000 to 38000

Here's my flt pln:

Before time skip:

After time skip:

Quote from Jet-Pack (IPACS)

Thanks this is a known issue and I have found a fix for it, which should be included in the next updates.

Thanks !! I'm very glad !!!