Pasting large amounts of text into hyper appears to be "lossy"?

• I am on the latest Hyper.app version
• I have searched the issues of this repo and believe that this is not a duplicate

• OS version and name: macOS Mojave 10.14.2 (18C54)
• Hyper.app version: 3.0.0-canary.1 (canary)
• Link of a Gist with the contents of your .hyper.js: https://gist.github.com/limbero/a4d0ee4a4cd6f806abaf7a2d2dd445e6
• Relevant information from devtools (CMD+ALT+I on macOS, CTRL+SHIFT+I elsewhere): N/A
• The issue is reproducible in vanilla Hyper.app: I believe so but haven't fully checked.

Issue

I recently needed to move a craptonne of data from a spreadsheet into a DB. The easiest way to achieve it seemed to be downloading the sheet, opening it in an editor and using search/replace to morph each line into a SQL insert statement. Dumb? Yes. But it seemed the most straightforward way.

However, when I started postgres in hyper and pasted my 4k or so INSERT statements, it failed, and I spent a lot of time debugging my SQL until I realized that it worked just fine in iTerm or the standard macOS terminal.

What caught my eye is lines like this:
INSERINSERINSERINSERINSERINSERINSERINSERINSERINSERINSERINSERINSERINSERINSERINSERINSERINS in the output from postgres, content which is not present in the file, which seems to me like something about how copy/paste works in hyper is trying to be clever in a way which is not lossless.

Start by reproducing the large-paste scenario in Hyper 3.0.0-canary.1 on macOS with the provided .hyper.js configuration, comparing PostgreSQL output with iTerm or the standard macOS Terminal. The issue is done when large SQL pastes arrive without duplicated or missing text.