Not sure exactly if this is when this bug was introduced, but several places in the code assume that option_slug is an integer, even though it's set as a slug.
Reverting it back to an integer made it work as intended.
Whether or not you were planning to switch to slug I'm not sure shrug
Not sure exactly if this is when this bug was introduced, but several places in the code assume that option_slug is an integer, even though it's set as a slug.
Reverting it back to an integer made it work as intended.
Whether or not you were planning to switch to slug I'm not sure shrug
https://wordpress.org/support/topic/multi-select-bulk-action-not-working