I have a WP plugin, where all admin setting field values were suddenly changed to the letter 'a'. All settings are stored in one 'big' option in the table. Seemed like the serialization gone wrong.
I run a
var_dump on the
get_option value and it returned a truncated string, not an array as usual. I'll update the question once I can reproduce the truncated string again.
I only use the 'Save changes' button and let the WP Options API write to the option, getting the values from user changeable or hidden HTML fields.
Is there any special characters or similar that can prevent an option from being written properly which could result in the serialized array being truncated?
The cause has something to to with Instagram or an Instagram user name.