>  ckgoto (ktr == 1), wait
> 
> wait:
> 
> reinit reset

I have a fix, not tested with your csd but I think that the follow
change works:

  ...
  if (ktr == 1) then
      reinit reset
      kgoto  reset
  endif
  ...

instead of `ckgoto ... wait'. The solution with `ckgoto' is

  ...
  ckgoto (ktr != 1), cont
  reinit reset
  kgoto  reset
  cont:
  ...

It is the same but if-then seems clearest.
`kgoto reset' avoids the pass after `rireturn', when `ktime' is zero.
A proof of concept is

<CsoundSynthesizer>
<CsInstruments>

sr = 44100
kr = 10

instr 1

reset:
  prints "=== start ===\n"
  ktime  timeinsts
  if (ktime < 1) kgoto end
  rireturn

  if (ktime >= 2) then
    reinit reset
    kgoto  reset
  endif

  printk2 ktime

end:

endin

</CsInstruments>
<CsScore>
i1 0 5.9
</CsScore>
</CsoundSynthesizer>

csound -n test.csd
...
new alloc for instr 1:
=== start ===
 i1     1.00000
 i1     1.10000
 i1     1.20000
 i1     1.30000
 i1     1.40000
 i1     1.50000
 i1     1.60000
 i1     1.70000
 i1     1.80000
 i1     1.90000
=== start ===
 i1     1.00000
 i1     1.10000
 i1     1.20000
 i1     1.30000
 i1     1.40000
 i1     1.50000
 i1     1.60000
 i1     1.70000
 i1     1.80000
 i1     1.90000
=== start ===
 i1     1.00000
 i1     1.10000
 i1     1.20000
 i1     1.30000
 i1     1.40000
 i1     1.50000
 i1     1.60000
 i1     1.70000
 i1     1.80000
 i1     1.90000
...

tito