DESCRIPTION

An H5P Column activity contains multiple Fill in the Blanks and those components have numerous blanks (greater than 100).  When attempting to open the H5P activity the page flickers repeatedly and never fully loads.

STEPS TO REPLICATE

1. Create a new course and enter it.
2. Go to More > Content bank.
3. Click Add > Column.    
4. Provide a title.
5. In the Content drop-down menu, select Fill in the Blanks.
6. Enter the task description:
List the states of the United States of America in alphabetical order.
7. Copy and paste the contents of the attached fib_1st_text_block.txt into the text block.
8. Save.  Confirm that the H5P activity loads without issue.
9. Edit.
10. Below the first Fill in the Blanks, click "Add content".
11. In the Content drop-down menu, select Fill in the Blanks.
12. Enter the task description:
List the states of the United States of America in REVERSE alphabetical order.
13. Copy and paste the contents of the attached fib_2nd_text_block.txt into the text block.
14. Save. Confirm that the H5P activity loads without issue.
15. Edit.
16. Below the second Fill in the Blanks, click "Add content".
17. In the Content drop-down menu, select Fill in the Blanks.
18. Enter the task description:
List the last name of the first five US presidents.
19. Copy and paste the contents of the attached fib_3rd_text_block.txt into the text block.
20. Save.

OBSERVED BEHAVIOR:
Page flickers repeatedly and never loads the H5P activity.

EXPECTED BEHAVIOR:
H5P activity loads without issue.

REPLICATION LOCATIONS

sandbox.moodledemo.net - 4.2.1
multiple 4.1.3 sites

ADDITIONAL INVESTIGATION NOTES

There does not seem to be a hard limit on the number of blanks, but somewhere around 100 is generally where I start seeing issues.{}

ATTACHMENTS
Files to assist with replication set-up
fib_1st_text_block.txt
fib_2nd_text_block.txt
fib_3rd_text_block.txt

column-1.h5p - in case you rather test with a completed activity