Robot localization doesnt affect pose in filtered odometry

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Hi!

Im sending nav_msgs/Imu from Arduino to ROS in topic /imu. Its working properly. Im getting acceleration in X axis and angular velocity in Z axis. Header frame id is imu Arduino sends ticks from encoders to ros node too. Node comuptes X linear velocity and Z angular velocity. Then publishes nav_msgs/Odomto the /odom topic. In my opinion velocities are computed properly too. Header frame id is odom and child frame id is base_link

Units in messages meet requirements from REP103.

Im creating transform between base_link and imu

 <?xml version="1.0"?>
<launch>
    <node pkg="tf" type = "static_transform_publisher" name="base_imu" 
        args="0 0 0 0 0 0  base_link imu 100" />
</launch>

Then im trying to fuse both measurements using ekf in robot_localization package

My .yaml file is

frequency: 50

two_d_mode: true

publish_tf: false

odom_frame: odom

base_link_frame: base_link
world_frame: odom

odom0: /odom
odom0_config: [ false, false, false,
                false, false, false,
                true,  true,  false,
                false, false, true,
                false, false, false] 
odom0_differential: false

imu0: /imu
imu0_config: [ false, false, false,
               false, false, false,
               false, false, false,
               false, false, true,
               true,  false, false]
imu0_differential: false

process_noise_covariance: [0.05, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
                           0, 0.05, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
                           0, 0, 0.06, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
                           0, 0, 0, 0.03, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
                           0, 0, 0, 0, 0.03, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
                           0, 0, 0, 0, 0, 0.06, 0, 0, 0, 0, 0, 0, 0, 0, 0
                           0, 0, 0, 0, 0, 0, 0.025, 0, 0, 0, 0, 0, 0, 0, 0
                           0, 0, 0, 0, 0, 0, 0, 0.025, 0, 0, 0, 0, 0, 0, 0
                           0, 0, 0, 0, 0, 0, 0, 0, 0.04, 0, 0, 0, 0, 0, 0
                           0, 0, 0, 0, 0, 0, 0, 0, 0, 0.01, 0, 0, 0, 0, 0
                           0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.01, 0, 0, 0, 0
                           0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.02, 0, 0, 0
                           0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.01, 0, 0
                           0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.01, 0
                           0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.015]

initial_estimate_covariance: [1e-9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
                              0, 1e-9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
                              0, 0, 1e-9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
                              0, 0, 0, 1e-9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
                              0, 0, 0, 0, 1e-9, 0, 0, 0, 0, 0, 0, 0 ...