Air carrier Captain reported temporary loss of glideslope during approach. ATC cleared flight for visual approach.

Narrative

ZZZZZ RNAV arrival radar vectors after ZZZZZ for the ILS XXL.Received the following clearance from APPROACH controller:'Cross ZZZZZ1 at 3000'; cleared for the ILS XXL.'Autopilot intercepted the LOC and a short time later the Glideslope.I was monitoring the progress and scanning inside and outside when the FO called out that we would be too low at ZZZZZ1.I replied the Glideslope was showing captured and showing no deviation.My FO said he saw that but we were already at 2800' prior to ZZZZZ1.At this point the Glideslope indication disappeared and an amber line showed on the Flight Mode Annunciator and the autopilot disconnected.I took control manually and requested the FO notify ATC that we 'lost the Glideslope'; we were subsequently cleared for the visual approach.We crossed ZZZZZ1 at approximately 2500'.The approach chart for the ILS XXL does not show ZZZZZ1 at a hard 3000' altitude however we were not in compliance with the ATC clearance.The Glideslope indication returned but appeared to be unreliable so I turned off the Flight Director and completed the visual approach on the PAPI indication.Cause: On the ramp the Central Maintenance Computer showed an intermittent failure history of the Glideslope.Suggestions: This was an approach at night in clear VMC conditions into an airport at sea level.We flew ZZZ1 to ZZZ.If this would have happened in IMC going into ZZZ1 this would have been a much more exciting and dangerous event.The fact that it was a non- event under the conditions does not make it any less concerning that Aircraft X is flying the system with known intermittent faults of a critical system.The aircraft was already unable to do CATII/CATIII auto land due to another system fault.