PHP 5.6.27 - PHP-FPM
All updates current to system, i-mscp and all plugins except for php switcher and whmcs ...
Under 'Users' - 'Domains' - 'Overview' - 'Manage SSL Certificate'
When enabling HSTS, I try to disable HSTS includeSubDomains directive by clicking and highlighting No, click on update at bottom of page. I get a success message. When I go back in to verify status, the Yes is still highlighted and the SubDomain directive stays enabled. No matter how many times I try this, it does not disable. I do know that I used this option in i-MSCP version 1.3.6 with no issues. (Nextcloud complains when SubDomains directive option is enabled is why I even use this anyway, doesn't stop my cloud from running anyway).
I have looked through my logs are see no errors or anything that would shed a light on the problem.
I looked though the forums and bug tracker and didn't see anything related to this situation, so I apologize if this is posted somewhere as my search came up fruitless.
I must add, as I often like to, that i-MSCP is the best control panel I have used and my system runs so smooth. I rarely run into problems, unless I broke it, and even then, so simple to restore. My errors logs are so clean it is crazy .... Keep up the great work ..
Thanks as always ...