There is now no warnings for clear lag. it just plops up in chat saying (number) entities have been removed the clear lag will occur in 60 seconds and so on no longer happens please fix this
If this is in survival then it does have the ground items will be cleared in 60 seconds and then ground items will be cleared in 20 seconds.
Ok I now know what you mean as I have noticed it as have many other people. Just to let you know Jerekul has told Alex about it so something should be happening so just be careful.