Create new account page with lots of custom fields has height problem

I facing some issue from my discourse when new member signup using mobile . I think because created many custom field and make the fill up form cannot scroll up to fill my email , user name and passwords . Anyone facing same issue ? ![image|281x500]

I try adjust it from CSS / Mobile ( sorry I’m dump in CSS ) but still cannot fix the issue.

create-account .user-field label {
  width: 190px

.create-account .user-field .controls {
  margin-left: 100px

I just pushed a fix that solves this issue:

If you want to add this fix immediately you can add this css to your mobile stylesheet:

.fixed-modal {
  .modal-middle-container {
    margin-bottom: 0;
  .modal-inner-container {
    max-height: 90vh;
    overflow: auto;