A32nx: [BUG] Autopilot oscillates up and down on ILS approach and does not follow glidepath

[tankedman]

Mod Version

release version 0.3.1

Describe the bug

After intercepting the ILS from under the glideslope with AP APPR mode, the aircraft oscillates up and down aggressively.

To Reproduce

1. Override ILS frequency in RAD NAV page
2. Intercept the ILS glideslope from below it at about 150kts
3. Observe the aircraft

Expected behavior

The aircraft pitches up only slightly, if at all, and captures the glideslope gradually.

Actual behavior

The aircraft pitches up aggressively, overshoots the glideslope, then pitches down aggressively. This repeats over and over until autopilot is turned off.

References

Additional context

Was this working before/when did the issue start occurring?
working before japan update
Is this a problem in the vanilla unmodded game?
no

Discord username (if different from GitHub):
young_moola

[DoToAdventures]

I'm very positive this is not a problem introduced by the mod, we didn't touch any of that (because we're not able to touch the autopilot a whole lot.)

[fourdragons]

Just had this problem ILS 02C at KBNA. But there's an obvious problem with the database there, as it's listed as ILS 02, and shows up on the MCDU as 02L. ATC is correct, and the ILS selected is correct, leading to the correct runway (02C), but the ILS is skewed and the closer the aircraft gets to the runway, the further off-course it gets, even though it shows it tracking perfectly on the ND. Did a go around the first time, second time it did it again. Landed anyway (between 02L and 02C. Shh. Nobody died.)

[DoToAdventures]

I believe this is an issue with airports where there are three parallel runways and you attempt to land on the center one. I've observed this before the update a few weeks ago at KSEA 34C

[tankedman]

That could be possible, but I was having this issue on ILS 32 at Nagasaki, where there's only one runway. I'll try KSEA though

[Acrobot]

I've just tried landing on EPWR, (single) runway 29. Sometimes it worked fine, but sometimes I got the same problem as here. I got the problem when being under the glide slope, pitching up and then capturing the glide slope.