Loiter and alt hold mode alway climb up

My quad frame is f450 dji and apm 2.6 board. I start to fly as normal in stabilize mode it fly well. But when i try to switch to mode loiter or alt hold it is alway climb up. Please let me know how to fix it.

@gizmeau01,
Please provide tlogs and/or data flash logs to help troubleshoot your issue.
Regards,
TCIII GM

Check your logs for barometer altitude spikes or wrong readings.

This is my logs file and kmz. As image attached you will see in yellow and orange color as show that is when I am switch to mode alt hold and Loiter. It is alway try to climb up. Please help me to fix.

Did this get fixed?

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As above- did you find the problem? If so, post what you found to be the problem and your fix. It will help us all learn.

Thanks,
Rich