Editing QTableWidget items on iOS not bringing up keyboard

Items in a QTableWidget cannot be edited on iOS as the keyboard does not appear.

The issue can be seen in the cachedtable and frozencolumn examples.

Double tap on an item in the table to edit it, the item text is momentarily highlighted in blue with the rest of the item in white and then it reverts to the whole item highlighted in blue again. The iOS keyboard does not appear.