imho, it is intentional and not due to low-end font(s) or design apps. Easiest tell: the kerning (space between letters) is different in "Investigate" from the kerning in "Investigators." These two words are nearly identical and many direct comparisons can be made.
e.g., look at the "TI" pairing in each case… one has odd kerning, and one doesn't. just my $.02