Continiously printing "Landing sequence start"

This is my log file https://plot.dron.ee/g82s

i am having strange flight. in the middle of flight it stoped the motor and glided . on log error messages prints continiously " Resetting previous waypoint,Landing sequence start"

|22:18:24|Resetting previous waypoint|
|22:18:24|Landing sequence start|
|22:18:24|Executing command ID #189|
|22:18:24|Executing nav command ID #31|
|22:18:24|Resetting previous waypoint|
|22:18:24|Landing sequence start|
|22:18:24|Executing command ID #189|
|22:18:24|Executing nav command ID #31|
|22:18:24|Resetting previous waypoint|
|22:18:24|Landing sequence start|
|22:18:24|Executing command ID #189|
|22:18:24|Executing nav command ID #31|
|22:18:24|Resetting previous waypoint|
|22:18:24|Landing sequence start|
|22:18:24|Executing command ID #189|
|22:18:24|Executing nav command ID #31|
|22:18:24|Resetting previous waypoint|
|22:18:24|Landing sequence start|
|22:18:24|Executing command ID #189|

anyone can help me to understand what is going on here

What plane are you using ?

I am flying with flying wing Z-84

I’m not an expert , but I saw that your WP_radius is extremely small , 5 meters .

"Resetting previous waypoint"
probably means that your plane missed a waypoint and it is using the current location as the previous waypoint to avoid to consider the waypoint completed.

i dont thing problem is the WP_radius, when it is too small, drone should try to come closer to ha way point. i have flew many times with these parameers, this is the first time i am having this problem

Your plane went in a loop where there was a land start command ID#189 ,a previous waypoint was resetted , and a Loiter to Alt command ID#31 .

It exit from the loop the first time at line 803059 when Loiter to alt was complete and from the second loop at line 828558 when Loiter to alt was complete

Something strange is that at line 724378 the Ctun_Nav_Pitch became 20 and it remains till line 799428 a little before it exit from the first loop .
Another strange behavior is that the current draw do not follow anymore throttle RCOU_C3 from line 679304 till line 805423.

what do you think it may cause to this problem?

on erro messages i dont see any erro message.