Comment 24 for bug 1889128

Regarding the "Cannot read property 'part' of undefined" error, I have identified the potential for a race condition that could cause that error. I have pushed a new commit to the same working branch to avoid that race condition.

https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/berick/lp1887429-lp1889128-hold-prefs-and-multi-v2