Zotero-better-bibtex: Z5 test build 4220: Clicking around too fast in reference list after zotero opening causes crash

A small (and less important issue I guess), but when I start to click around too enthusiastically in the zotero reference list before the betterbibtex loading is finished, zotero crashes and needs to be restarted. Does not influence behavior afterwards, just need to learn to have some patience I guess :)

When submitting through zotero, it gave D1402030032 (zotero error ID), and I hope clicking on 'Report Better BibTex Errors..' in the advanced pane did send something, there was no confirmation there. In case it didn't arrive, the full log output is:

[JavaScript Error: "DB.getCollection(...) is null" {file: "chrome://zotero-better-bibtex/content/BetterBibTeX.itemPane.js" line: 80326}]

[JavaScript Error: "TypeError: Zotero.BetterBibTeX.ErrorReport.prototype.start is not a function" {file: "chrome://zotero/content/preferences/preferences.xul" line: 1}]
oncommand@chrome://zotero/content/preferences/preferences.xul:1:1


[JavaScript Error: "TypeError: Zotero.BetterBibTeX.ErrorReport.prototype.start is not a function" {file: "chrome://zotero/content/preferences/preferences.xul" line: 1}]
oncommand@chrome://zotero/content/preferences/preferences.xul:1:1


version => 5.0.18, platform => MacIntel, oscpu => Intel Mac OS X 10.12, locale => en-US, appName => Zotero, appVersion => 5.0.18, extensions => Zotero Word for Mac Integration (5.0.1.SA.5.0.18, extension), Zotero LibreOffice Integration (5.0.6.SA.5.0.18, extension), Zotero Better Bib(La)Tex (5.0.2.4220.master, extension), Shockwave Flash (26.0.0.151, plugin)

(3)(+0042422): {better-bibtex} PrefPane.getCitekeyFormat...

(3)(+0000002): {better-bibtex} PrefPane.getCitekeyFormat got [auth:lower]_[veryshorttitle:lower]_[year]

(3)(+0001181): {better-bibtex} Prefs.set citekeyFormat [auth:lower]_[veryshorttitle:lower]_[year]