BAQ Timeout

A BAQ that has been running all week now times out.
I can recreate the exact BAQ from scratch and it will work.
Copying the BAQ still times out, however.
What’s up with the original BAQ? Why is that one suddenly timing out and why can I create the same one from scratch and not have it time out?

Is the SQL generated the same?

Was the order of the tables the same? Sometimes that can cause the query being built to use a different plan.