After have done the steps above and confirmed that the problem is most probably in Opera, it's time to post about it.

Start the topic with a title that briefly describe the problem so people will know about what this is about.
Don't try to explain all the problem in the title but also try to not make it too generic.
Also, remember that the title is not part of your post, so don't start writing it in the title and continue on the post.

Use tags to make it easy for other users to find posts about similar issues. If posting about Opera Mail then add the 'Opera Mail' tag

In the post (body) you should include the following information:

• Your OS (Mac, Windows)

• Your version of Opera GX

• If the problem is with a page, a link to it

• A screen-shot of the problem if it's related to something not showing as should

• A description of the problem, including as much as information as possible

• Steps to (try to) reproduce the issue

• Expected behavior and actual one

First of all you should check if the problem is not being caused by an extension or a broken profile. Do the following required steps, re-starting Opera after each one of them and checking if the problem remains after each one.

• Disable all extensions

• Disable all mods

• Disable the ad-blocker

• Disable all limiters

• Reset settings to default

• Reset flags to default

• Create a clean profile folder/directory

• If the problem is with a web page, check if it works with other browsers, specially Chromium based ones

• Check if your drivers (Graphics Card, Sound, etc) are up to date

• Check if your OS is up to date