I face a strange issue. Any bulk operation in wp admin like deleting 20 images or updating a label on 50 posts is extremely slow and causes CF error 524. In case I disable the CF plugin everything is quite fast!
I have APO enabled so I cannot disable the plugin permanently.
What should I check, where shall I start?
Any help is appreciated!
Do you have a ticket #? If so please post it back here so we can escalate this issue. Otherwise, you can open a ticket by visiting Dashboard > Support > Contact Cloudflare, then picking Technical - Website > Speed/Performance > APO.