Nikon subsecond eposure bug

[bjober]

In ekos when imaging with setting of subsecond exposure only every other attempt succedes.
Could be a bug in indi_nikon_ccd or any call from there.

To Reproduce
Exact steps to reproduce the behavior.

1. Start ekos in kstar and stats ekos with the camera attached and ready.
2. Go to CCD and set any subsecond (0.5 in example) exposure and create such Sequence queue and start the sequence or simply capture a preview
3. Capture failes saying check INDI controlpanel for details. (says error expsure failed to save image unspecified error) -> Restarting capture attempt Make core compile #1 -> Capturing 0.500-second image... -> Capture failed. Check INDI Control Panel for details ([INFO] Starting 0.5 seconds exposure. ) -> Restarting capture attempt Make standard 3rdparty set compile from github clone.  #2 -> Capturing 0.500-second image... -> Capture failed. Check INDI Control Panel for details -
   (((INFO] Starting 0.5 seconds exposure)) -> Capture failed. Check INDI Control Panel for details ([ERROR] Exposure failed to save image... Unspecified error)
4. Restart the sequence queue or take a capture preview again and it works.

"2025-01-06T20:30:40 [Nikon DSLR DSC D7200] Captured /home/bb/Pictures/exp_test/Light/exp_test_Light_040.fits
2025-01-06T20:30:38 [Nikon DSLR DSC D7200] Received image 1 out of 1.
2025-01-06T20:30:38 [Nikon DSLR DSC D7200] Download Time: 1.08 s, New Download Time Estimate: 1.08 s.
2025-01-06T20:30:34 [Nikon DSLR DSC D7200] Capturing 0.500-second image...
2025-01-06T20:30:34 [Nikon DSLR DSC D7200] Job requires 0.500-second images, has 0/1 frames captured and will be processed.
2025-01-06T20:19:47 [Nikon DSLR DSC D7200] Capture failed. Check INDI Control Panel for details.
2025-01-06T20:19:47 [Nikon DSLR DSC D7200] Capture failed. Check INDI Control Panel for details.
2025-01-06T20:19:40 [Nikon DSLR DSC D7200] Capturing 0.500-second image...
2025-01-06T20:19:40 [Nikon DSLR DSC D7200] Restarting capture attempt #2
2025-01-06T20:19:40 [Nikon DSLR DSC D7200] Capture failed. Check INDI Control Panel for details.
2025-01-06T20:19:40 [Nikon DSLR DSC D7200] Capturing 0.500-second image...
2025-01-06T20:19:40 [Nikon DSLR DSC D7200] Restarting capture attempt #1
2025-01-06T20:19:40 [Nikon DSLR DSC D7200] Capture failed. Check INDI Control Panel for details.
2025-01-06T20:19:35 [Nikon DSLR DSC D7200] Capturing 0.500-second image...
2025-01-06T20:19:35 [Nikon DSLR DSC D7200] Job requires 0.500-second images, has 0/1 frames captured and will be processed."

Expected behavior
Expect the subsecond exposure to work every time..

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS:
  uname -a
  Linux astro 6.8.0-51-generic Changes to create new lx200 driver for OnStep Telescope #52-Ubuntu SMP PREEMPT_DYNAMIC Thu Dec 5 13:09:44 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

Kstars 6:3.7.4+202501011145ubuntu24.04.1
indi-full 2.1.1+202412060709ubuntu24.04.1

log with failed attempt and succes
indi_nikon_ccd_19:15:30.log

Log with changing every possible setting in indi control panel
indi_nikon_ccd_14:50:15.log

Output off
gphoto2 --list-all-config
nikond7200_settings.txt

Besides subsecond exposure failing every other times camera behaves properly.

Any help welcome. This behavior makes it difficult to take flats.
Cheers/
Björn