Reply-To not working

Hello,
This plugin has worked great for years. However, a couple issues that have started in the last month or so:
1) When I get a message from a custom via the contact form, the Reply-To goes to my email, not the customers. It used to work fine and as far as I know, nothing is changed. In the form I see Reply-To: [your-email] in the additional headers already. What’s the best way to troubleshoot this? Contact Form is up to date.

2) Not as important, but I’ve been getting a fair bit of spam lately. I’m using reCaptcha already. How can I solve this issue?

Running WP 4.9.9.

Thanks.