I’ve been noticing some inconsistent behavior with the recaptcha field in forms that I think I’ve narrowed down to the TotalCache plugin.
When the plugin is deactivated, everything seems to work. After activating the plugin with Object Cache disabled, everything seems to work. When I enable Object Cache, the recaptcha field no longer reliably displays after refresh.
Note that in incognito mode, the field appears to work reliably, even when Object Cache is on.