Chords of a short duration that have embellishments (like sus4) are illegible - the font size is too small. See http://www.hooktheory.com/theorytab/view/sigala/sweet-lovin for an example (also an example of a theorytab where the arbitrary restrictions on characters in titles are a problem).
Workarounds include: removing the embellishments (makes the tab less accurate, or outright wrong) or making the chords longer (reduces the available detail - the harmonic rhythm in the Sigala example is totally different from the melodic rhythm, so the chord duration is important and cannot be changed).
Please fix this somehow. For example: chord symbols are allowed to encroach into rests on either side (first Ebmaj7sus2 chord in the Sigala example), or the chord symbol expands to a legible size when the mouse is hovered over it/when tapped on a tablet device.