Switching beteween editing modes breaks blocks

[cokertmek]

After updating to WordPress 6.7, if I switch between the "edit" and the "preview" mode in the block-editor, the block breaks stateing "This block has encountered an error and cannot be previewed."

This happens to all blocks.

I'm getting a JS error "Uncaught TypeError: this.tabs is undefined" and "The above error occurred in the component:"

[mayanktripathi32]

Hello, and thank you for reporting this issue!

Could you share a recorded video of the issue? I’m currently unable to replicate it. Also, please remember to open any issues related to Gutenberg at GitHub Issues - ​https://github.com/WordPress/gutenberg/issues/new/choose

Thanks!

[desrosj]

@cokertmek When you refresh the page, are all of the blocks preserved and still working?

[cokertmek]

Hello, sorry for the late reply. As of WordPress 6.7 "SCRIPT_DEBUG, true" enables the React StrictMode. This caused an js-error which breaks the block(s). I just set define "SCRIPT_DEBUG', false" in wp-config.php as a temporary workaround. Not sure now that if it is about ACF block.

[desrosj]

@cokertmek Could you paste the full text of the error you are seeing? Also, could you share more why you think ACF blocks may be causing the issue?