Happy you like it <3 I'm really looking forward to bringing more to this with the next game!
What you describe reminds me a bit of an issue someone had very early on, it was a focus problem and clicking on another window and then back in itch.io was fixing it for me. It doesn't look like there was a fix for it, it suddenly got better.
Sorry if this doesn't help. Pretty crazy that something as simple as a text field can break, and pretty sure it's out of my hands.