WYSIWYG Editor’s Content Not Showing after 6.2

Hello,

I do not see that issue on my end when creating a new WYSIWYG field with WordPress 6.2. Please make sure you have the latest version of Meta Box 5.6.18 then disable all plugins except Meta Box, MB AIO, switch to a standard theme of WordPress and check this issue again.

Also, I can confirm that after disabling all other plugins it still does not work.

I am having this problem too but the is not showing in the Visual and Text editors.

And going further ...
its eems to be realted to the setting "Show in REST" in advanced settings and/or if the CPT supports Editor

I also got this issue in some sites. The strange thing is not all my sites upgraded to 6.2 have this issue, while they have similar plugin setup. This is what I found:

1. Issue only happens in Chrome or Safari. They all work fine in Firefox. I have one case working fine in Chrome but broken in Safari. Very weird.

2. Issue only appears to post with Gutenberg editor. So setting page does not have this issue.

I got a new observation.

When the bug appears, if the input is in a cloneable element and you add more, the new input works fine. Only what initially displayed input boxes have this bug. So I guess this bug is related to the initialization stage.

Thanks to Feng Chen:
2. Issue only appears to post with Gutenberg editor. So setting page does not have this issue.

I disabled Editor for my CPT and could see the contents of the WYSIWYG