Copter 4.0.7 Unable to climb

I am having a weird problem.
If you look at my logs at time aproximately from 14.53 to 15:04 drone is receiving command to climb (PWM at channel 1 is 1720us), but drone wont climb higher, despite the fact, motors are not maxed out.
Can you please tell me what could be a problem?
Thank you

Altitude fence? Power (current) limiting?

Yes! you are right!
It was fence, i forgot i did set it in the past to 90m.
Thank you

What i didnt know was, that fence wont allow you to climb higher.
What i thought was, that if you breach the fence it will land or RTL with fence action set to 1.