JS error ocurring when creating a new field causing issues.

[Codesesh]

When adding a new field there is a JS error showing in the console, this seems to be effecting the ability to publish the form aswell, seems to keep saving it in draft mode.

Not sure if this issue should be here or in the actual user-forms github repo..

Made a video to demonstrate: https://cl.ly/401P3f0A022G

Have tested it on a fresh copy of SS 4.2.1 with dnadesign/silverstripe-elemental & dnadesign/silverstripe-elemental-userforms installed.

Error that is showing console:

userforms-cms.js?m=1529473687:1 Uncaught TypeError: Cannot read property 'scrollHeight' of undefined at HTMLFieldSetElement.<anonymous> (userforms-cms.js?m=1529473687:1) at HTMLFieldSetElement.fn (eval at e.exports (vendor.js?m=1532959962:1), <anonymous>:3800:19) at HTMLFieldSetElement.dispatch (eval at e.exports (vendor.js?m=1532959962:1), <anonymous>:3332:9) at HTMLFieldSetElement.eventHandle (eval at e.exports (vendor.js?m=1532959962:1), <anonymous>:2941:28) at Object.trigger (eval at e.exports (vendor.js?m=1532959962:1), <anonymous>:3210:12) at HTMLFieldSetElement.eval (eval at e.exports (vendor.js?m=1532959962:1), <anonymous>:3869:17) at Function.each (eval at e.exports (vendor.js?m=1532959962:1), <anonymous>:660:20) at init.each (eval at e.exports (vendor.js?m=1532959962:1), <anonymous>:271:17) at init.trigger (eval at e.exports (vendor.js?m=1532959962:1), <anonymous>:3868:15) at Object.success (bundle.js?m=1532959962:1)

[digitall-it]

Has this bug been corrected?