How to easily access the place right after a left superscript?

We look at the sample code:

The matrix <math|<lsup|t>>


It is sometimes very difficult to access the right after a left superscript. For example, in the first line, I cannot access the place after the left superscript “t” either by cursor or by left/right arrow. I find two ways to access, but it seems a bit combersome:

  1. Access the place at “t”, then “structure-exit”.
  2. Access the text environment after the math environment, then press backspace.

In contrast, one could use left/right arrows to access this place in the second line. Am I using TeXmacs incorrectly?