Latest Version and Build of Moodle (3.5 20180628) and I'm getting these random 403 errors. Forcing a refresh on the page using Ctrl+F5 tends to load the page properly. I see there has been a solution since some posts in 2008 of disabling Apache's SecFilterEngine but this is an extremely poor answer.
Attn: Moodle Developers! Please provide a proper response without lowering security to fix this 403 Issue...
The answer of the following code block in a .htaccess file, although may fix the problem, is unacceptable.
Thanks in Advance,