Uarm swift pro Blockly doesn't do movement

I use blockly to program my Uarm swift pro.
sometimes it doesnt want to preform some of the movements (i always use move to x,y,z) in my sequence, without any clear reason. the first 2 or 3 movements work without any problem, but then it just skips some of the following movements. does anyone have an idea why this happens?

the first 2 movements work just fine. but the last one just doesnt work.

We test the program, the position is unreachable, you can try other position.
Please check the picture below:

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