According to Support, the current column width of the Instructions worksheet is a static 59 units (whatever unit Excel uses) and the cell is too small to display the Instructions.
Some of the Instructions would not display the complete instruction in the bottom (see the attached file for example).
Support has confirmed that there is no workaround to fix this issue other than adjusting the cell manually.
To be user friendly, I would recommend to have the 'Instruction Column' be Auto Formatted.
These settings are possible in the 3rd party plugins. Excel Integration is also not a dspMigrate feature so I'm moving it to the DSP Platform