Cannot select the last placeholder on dfx function

[kingfisherphuoc]

Description

Cannot select the last placeholder on dfx: \int

Steps to Reproduce

(Required) Provide steps that are specific and repeatable

1. insert dfx into mathfield: \int_{\placeholder{}}^{\placeholder{}}{\placeholder{}}
2. Move the selection with arrow key
3. The last placeholder is not selectable.

Actual Behavior

The last placeholder was not selectable, even though the previous ones could be selected by navigating using arrow keys.

Expected Behavior

The last placeholder should be selected as other placeholders.

Environment

MathLive version: 0.98.6

Operating System _macOS

Browser Chrome

The last placeholder should be selectable as the previous one.

[arnog]

Note: the error is happening because of an extra pair of braces. The following expression works: \int_{\placeholder{}}^{\placeholder{}}\placeholder{}