That ALMOST happened to me... Thankfully I caught the problem before it happened.
The Slow retraction was due to low battery power. This may be due to batteries at end of age or .. Read my story.
Might also be a tripped breaker in your breaker panel (CONV).
The story... Last October (29th) I came home from Church and noticed things were not right.. Very low voltage.. Seems my veneraboe old duodecade (12 years) old Progressive Dynamics 9180 had bit the dust... So Being sunday it was off to Auto Zone for a Deltran Battery Tender.. This is the big one. 70 amp jump start (no use in this case) 20 amp Bulk and 1-2 amp tender. Set it to 20 amps and 24 hours later it dropped to tender. I was packed so I pulled the slides in and off we went.
TO Marshall MI.. Where on Halloween I took my Debit card and the old 9180 and walked into the Progressive Dynanics Parts and Serivce department.
A short time later I walked out and it's been fine ever since.