Unexpected paragraph text erase which have dynamic forms

Hello,

I made two step address input forms using z.select dynamic form. (Please refers attached notebook)

It worked basic steps fine that choose a state firstly, and then choose city in the state.

Most of case it worked well, however, randomly the paragraph text which have dynamic forms was entirely erased, and it filled only one character (space character)

Reproduce step was like below;

1) Start zeppelin daemon

2) Login runner permission user (my case, 'test1' user was specfied in the notebook)

3) Open the notebook

4) Choose state and city several times

5) Press F5 to refresh web page

6) Repeat above 4), 5) steps several times

7) Suddenly there is no response when selecting a state

8) Check notebook source, then the paragraph text become erased. (remain only space character)

9) If it doesn't reproduce for long time, then repeat from step 1) again.

Interesting thing was that, I could only reproduce this issue with the user which have runnable permission.

I never had seen this issue with notebook owner so far.

I also attached zeppelin log message when this issue was happened.

Unfortunately I couldn't find usuful information from there...

This problem very annoying me to service notebook to my colleagues.

Please have a look this issue, and if you guys need more information, kindly let me know.