Hi again,
As CF7 load captcha script in all pages, this may create some conflict in other pages not in CF7 page, because this plugin does not load in CF7 page.
Can you disable captcha in CF7? Just remove keys from CF7 captcha settings. Then see if this working. If you received spam contact messages you can activate https://wordpress.org/plugins/spam-protection-without-captcha/ temporarily which will prevent spam using different approach and will not have any conflict.

Run one or 2 days for testing. Let me know the result.