Problems loading and submitting sequential RE tasks

[gtsueng]

Multiple users have reported having to leave the task and return to it from the dashboard in order to do the next task within an RE doc:

"When I try to execute the application only allows me to do one relationship and then it locks up. I did one of the entries “ATP6V0A2-CDG.” This entry is displayed on several pages as a drug. I selected the “ATP6V0A2-CDG is not a drug concept.” When I submit it accepts the first relationship. When I try to execute the next relationship page which has the same initial comparator, if I select the not a drug entry, the application hangs. If I exit and reenter the RE, it then takes the next submission, but once again it hangs on the second page submission. Once again, exiting and reselecting the page works and the following entry hangs. Since the RE has 14 pages, this means exiting and reentering the RE 13 times. " <--a firefox user

"Hi Team, is anyone else having issues with submitting their relationship extraction decisions, mine are not working all the time, i have to go back to the beginning and try again until it lets me submit?"

"I tried to do one relationship extraction.
https://mark2cure.org/task/re/2285/
1- I used my IPad with Safari
2- I was to chose a relationship with oxygen and Parkinson and /or Genetic defects.
I selected cannot be determined and hit summit but nothing happened.
I tried the other 2 options and it didn’t work.
I proceeded to the next relationship extraction. Same thing. "

[gtsueng]

Confirmed that this issue exists in firefox, can be replicated (albeit sporadic), but it didn't take me long to find an example/reproduce. Video here:
https://drive.google.com/open?id=0B4I4dLIBkIcjclBWSFA5cXNoUG8

Confirmed that this problem can be replicated in chrome as well. Used inspector and saw that mousedown count went up when submit button was clicked, but still nothing happened. Video here: https://drive.google.com/open?id=0B4I4dLIBkIcjTGRidngxZWUzSlU

So far observed in:
https://www.mark2cure.org/task/re/1558/ (shown in video)
https://www.mark2cure.org/task/re/1522/ (ACTH vs 'Lack of awareness about the syndrome')
https://www.mark2cure.org/task/re/2073/ (thioredoxin vs dysfunction)

Confirmed that this problem can be replicated in safari on an ipad.

[x0xMaximus]

Confirming that I'm able to reproduce in the examples.

APIs are 200s. DOM events are being called. Looking into resetting of region states.
Annotations array was empty in all examples, maybe be the cause.

[x0xMaximus]

being caused by channel.once which was done to fix the double submit issue during training

[gtsueng]

Users are still reporting this issue as of January 16th

Replicated: https://drive.google.com/open?id=1QvRGCNSX78W07UOEtc3u9RyIaJpaJadm