Some columns become read only, such as a lookup drop down list.
One to many relationship column. Such as a list which store order header, but need to include order items possible or not.

4 comments
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Richard commented
Not yet. It came up in location column on iOS app
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Samer commented
In Android it dissapears completely
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Fletch commented
the problem still exists with lookup columns being read only in SharePoint iOS app. Feb 14 2019 - happy v-day to whom it may concern.
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Leonardo Santos commented
The problem was resolved?