Install some smtp plugin for Wordpress with debug and extended logs and check.

Well i have no idea howto. I always follow a standard procedure to check for problems and that came up.

Also try to fix several errors you have in various places. Those also could be the reason for your problems. Like those: ReferenceError: jQuery is not...

@percysgrowroom If the issue is EASY to replicate (wasn't in my case), just try to do what i suggested for a few hours. And then you will know. Nothin...

He is hosting on a LiteSpeed server. Litespeed server has ENABLED a special captcha (google) for brute force protection. No matter if you disable all ...

But this could be your problem (it was mine also). Anyways, you are the boss.

Try to put this on top of your .htaccess WordPressProtect off, 0 This will disable Litespeed webserver protection captchas/brute force for Wordpress s...

This is not resolved in 1.6.5

Can/want to post a url so we can get the whole picture and maybe help ?

reverted back to WP 4.9.11 Yeap, i was right. The issue is with Wordpress 4.9.11 and NOT with WP 5.2 latest. So it is not a plugin or theme problem as...

Ok, i think i found it. I update my test site from WP 4.9.11 (that had the issue) with latest WP 5.2.x and now it works. So it is not a problem with p...

@sofy This happens with NO plugins at all and with default WP theme also. So i don't get it. It can't be what you say, i mean some plugin changes...

@sofy This is a test site. Wordpress 4.9.11 and NO plugins and default theme. Still same problem. Or it is some setting i miss or a bug of yours. Thi...

@sofy I can't possibly count the times i have heard that (the "we don't find such an issue") from developers or support people in my business life ....