The word Rolex causes publishing to fail

[wpjh]

If you create or modify a post on WordPress, and the post includes the word "Rolex" anywhere - in the heading, body, image caption etc., you will get an error when you try to publish.

Error has been replicated on 6 different WordPress installations, including with all plugins disables and default theme.

[swissspidy]

I can not reproduce this.

This sounds like you have some antivirus software, web application firewall, or browser extension interfering with WordPress.

[wpjh]

Replying to swissspidy:

I can not reproduce this.

This sounds like you have some antivirus software, web application firewall, or browser extension interfering with WordPress.

Thanks for your message, strange you can't replicate it.

If I disable Gutenberg, I can save a post with the word Rolex. Which suggests it is not antivirus software, firewall or browser extension, as enabling/disabling Gutenberg should have no effect if one of them was the cause.

[swissspidy]

enabling/disabling Gutenberg should have no effect if one of them was the cause.

Not necessarily, it could have an effect. Also, in your original report you mentioned this happens even with all plugins disabled.

Does this issue also happen for example on ​https://playground.wordpress.net/?

[wpjh]

Replying to swissspidy:

enabling/disabling Gutenberg should have no effect if one of them was the cause.

Not necessarily, it could have an effect. Also, in your original report you mentioned this happens even with all plugins disabled.

Does this issue also happen for example on ​https://playground.wordpress.net/?

It does not happen on ​https://playground.wordpress.net/

Others have replicated it, but on the same server I use. What on the server could cause this? Particularly when it only happens on Gutenberg editor not classic?

[swissspidy]

What on the server could cause this? Particularly when it only happens on Gutenberg editor not classic?

This definitely sounds like a server-specific issue then. This may very well be a web application firewall (WAF) causing the issue. The block editor (Gutenberg) uses the REST API for saving posts, whereas the classic editor doesn't. Many WAFs have stricter rules for REST API usage.

I recommend reaching out to your hosting provider about this issue. For now I'm closing this ticket.