Text cutting off bottom of widget when using HTML

First time using WordPress to build a website. I want to add a few sections with html text and images, but when I use HTML in the text widget, the amount of text I can input seems limited. See the website for what I mean: https://usagain-minneapolis.com/

It get’s cut off, strangely. Even more strangely, the last sentence of the 2nd/middle column (“Sign Up”) isn’t cut off, but the paragraph above it is…

Any help? I can’t figure it out for the life of me…