A320 captain reported the aircraft failed to initiate a proper level off while on the JFUND2 arrival...

Narrative:

The previous week I flew the same [JFUND2] arrival into bos. The aircraft should cross seets intersection at or above FL210. Last week it did not level off as it should have. We had to intervene and manually stop the airplane from descending. We did not have an altitude deviation. Fast forward to today and I am now doing the exact same arrival in a different airplane. This time I am watching intently to see if the aircraft levels as it should. Nope!!!!! Three miles before seets the aircraft was diving below FL210. We were correctly all set up with the airplane in navigation and des and on glide path. Without aggressively grabbing the airplane and leveling off it would have blown through FL210 by at least 1000 feet; if not more. For the second time; I had to grab the airplane and manually stop it from descending to avoid a major altitude deviation. I believe there is a problem somewhere in the database. It correctly shows on the navigation display and matches with the chart; however the airplane descends as if unaware of an altitude restriction.

Original NASA ASRS Text

Title: A320 Captain reported the aircraft failed to initiate a proper level off while on the JFUND2 arrival to BOS. Captain stated this is a reoccuring type of event.

Narrative: The previous week I flew the same [JFUND2] arrival into BOS. The aircraft should cross SEETS intersection at or above FL210. Last week it did not level off as it should have. We had to intervene and manually stop the airplane from descending. We did not have an altitude deviation. Fast forward to today and I am now doing the exact same arrival in a different airplane. This time I am watching intently to see if the aircraft levels as it should. NOPE!!!!! Three miles before SEETS the aircraft was diving below FL210. We were correctly all set up with the airplane in NAV and DES and on glide path. Without aggressively grabbing the airplane and leveling off it would have blown through FL210 by at least 1000 feet; if not more. For the second time; I had to grab the airplane and manually stop it from descending to avoid a major altitude deviation. I believe there is a problem somewhere in the database. It correctly shows on the navigation display and matches with the chart; however the airplane descends as if unaware of an altitude restriction.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1609015
Time
Date	201901
Place
Locale Reference	BOS.Airport
State Reference	MA
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR JFUND2
Flight Plan	IFR
Component
Aircraft Component	Navigation Database
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Experience	Flight Crew Last 90 Days 177 Flight Crew Type 915
Events
Anomaly	Aircraft Equipment Problem Less Severe

A320 captain reported the aircraft failed to initiate a proper level off while on the JFUND2 arrival to bos. Captain stated this is a reoccuring type of event.