A placeholder does not recognize function name when not typed in one go #2536

Description

A placeholder does not recognize a function name when not typed in one go.

Steps to Reproduce

Type in 'ex' into an empty placeholder, then jump to another placeholder and come back to it, and type in the last
character 'p'. It won't recognize the input as the function 'exp', instead, it is just three variables e, x, and p.

Expected Behavior

It should recognize the input as the function 'exp'.

Environment

MathLive version: 0.101.1

Operating System Windows 11

Browser Chrome, Edge.