*Entering numbers for example “１２３４” as the whole width version(全角) into numeric or decimal fields and hitting the spacebar would enter into the field as “12341234...”. Try entering a number by letting that number selection menu open, and press space bar and arrow keys. Using numpad, numpad area on the regular keyboard or numbers on the top of the keyboard all same behavior.

Using numbers on the top row on the keyboard:
1 Enter １２３４ as the whole width version(全角)
2 hit space bar: empty
3 hit space bar again then duplicate 1234. like 12341234 *it seems whenever spacebar hit half-width character, then enters.

Another behavior
Step:
1 Enter １２３４ as the whole width version(全角)
2 hit space bar: empty
3 enter: empty

Using numpad
Step：
1 Enter 1234 as the whole width version(全角), but it seems as half-width.
2 hit enter: duplicate numbers.