OSD flight data disappear when arming

 

I am running Minim OSD V1.0 on ArduplaneV3.2.3. Power supply to OSD is 2 stages, ie. 12V to video side and 5V from APM2.6.
OSD firmware is R800, Char set 2.4.0.2 mcm

As soon as I arm the motor by pushing the rudder stick to the right, the flight data disappear on the display. This does not happen every time.
Pressing the OSD reset button makes the data reappear. Powering up the APM BEFORE or AFTER powering up the video Tx does not make any difference.
Please help.

Another OSD related issue : --
On the same platform as above, after powering up both the APM and the video Tx, the flight data very often do not show up, only after pressing the OSD reset button do they appear.
Sometimes the flight data appear right away without pressing the OSD reset button. Again, the order for powering up the APM and video Tx does not matter.
This problem has been bothering me for 3 years. Can anyone shed some light on this issue ?

SR0 and SR1 (default) setting of parameters as follows :--

SR0_EXT_STAT,2
SR0_EXTRA1,4
SR0_EXTRA2,4
SR0_EXTRA3,2
SR0_PARAMS,10
SR0_POSITION,2
SR0_RAW_CTRL,2
SR0_RAW_SENS,2
SR0_RC_CHAN,2
SR1_EXT_STAT,1
SR1_EXTRA1,1
SR1_EXTRA2,1
SR1_EXTRA3,1
SR1_PARAMS,10
SR1_POSITION,1
SR1_RAW_CTRL,1
SR1_RAW_SENS,1
SR1_RC_CHAN,1

Thank you.

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