Help needed for "Text Shadow" setting on "Image Tint" area for Canopy Theme

I am using this page to create a background shadow for my text over images so the text is more legible. The “Text Shadow” setting doesn’t seem to appear behind all of the text (only in the upper corner of a block of text). Is there a work around?

See the 5th Hero Image in the slide show on this page. There is a darkness behind the text in the upper right but the text is virtually illegible over the image of the bottle.

https://indianmeadowherbals.com/

I have inherited this site from a previous designer and am trying to correct a few things.