That fee won't be for reopening of the case that might be biometric related fee or some other application related fee that you missed earlier or your workpermit fee coz open work permit has two fees usually people don't pay one of the two fees. Though it's a positive sign.
Finally I got the passport request today. Thanks to all who kept updating with their cases. My timeline is below (approx dates)
SOWP Refusal received May 10
JR initialed May 28
Settlement offer July 15
Notice of withdrawal July 20
No communications for 3 months (raised two webforms)
MP enquiry Oct 30
GC account opened and request for additional docs Nov 5
Docs submitted Nov 8
WP fee request Nov 11
PPR Nov 20