InDesign: font not displaying properly, letters are zigzagged up and down.

Hi all!

I have an InDesign document, using a font I had to install from online (I have 4 types, they are all .ttf from the same link, github; the font is Sukhumvit-Set, and it was not available in creative cloud or fonts.adobe.com). 

When viewing my ID document using the "Fit Page in Window" option, some of the letters are larger than others (I have to type in all caps for a project). However, when I zoom in closer to the affected objects, the text appears to have fixed itself, and all of the letters are the same height (not zigzagging up and down).

I have also tried exporting to an Adobe PDF, to view how the file outputs, the problem persists. 

I have tried troubleshooting, and a common suggestion was the GPU, but from what I learned, ID on Windows does not have GPU options in preferences. Also, my display performance is set to High Quality.

I attached screenshots of the problem, as well as the fixed appearance when zooming in.

Any help is much appreciated. God bless!

P.S. As I was writing this, I realized that the suggestion that might arise for me to simply use a different font. For the project, I am required to use this font.