Adobe Acrobat/Reader DC SDK Plugin Icon resizing incorrectly when user changes the font size

When the user changes the size of text in their window display options the custom icons of the sample plugin get really small. The native icons resize appropriately. Is there anyway to get the custom icons to behave like the native icons?

1920 x 1080 with text size at 100% 

1920 x 1080 with text size at 175%