Hi Ben,
WP Version: Version 5.5
WordPress Zero Spam: Version 4.9.13
Site: EvolutionVN (affecting my WP Forms)
I know this is an issue because it blocked my (test) mobile submission and worked once I turned off the plugin. For my customers as well. It had been working for months before this.
Settings
Cookie Expiration: 7 Days
Share Spam Detections: Enables
Blocked IPs: Display a 403 Forbidden Error
Spam Detections: Display a 403 Forbidden Error
Log Blocked IPs: Disabled
Log Span Detections: Disabled
Auto-Block IPs: Disabled
Permanently Auto-Block: 3
API Timeout: 5
Verify WPForms Submissions: Enabled