Over the last month, I have noticed the Mini 4 Pro is flying jerky going forwards, even in normal mode, and seems to bob up and down, anyone have any ideas?
Any video or Airdata to share ?
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Iād tell the missus I need a new one itās a perfect excuse.
Have you tried the compass re collaborate outside with a good GPS lock?
Check your props for damage. Even a slight nick in one of them can affect flight 
Mine did the same last week for about 5 seconds. Props all good and I did look at the Airdata log but nothing showed.
As Chris has already said - Airdata may help. What about wind level and what altitude you were flying at ??
Mine has been doing the same. I suspect its the obstacle avoidance detecting things that are not there, then realising itās not there, then seeing it again ā¦ and so on.
As it happens so intermittently, its hard to prove, but I have tried multiple runs back and forth, and it never happens when OA is turned off, but does (occasionally) happen when OA is turned on.
I have looked at AirData and there is nothing showing there.
I discussed this previously ā¦ Has anyone else experienced a strange ābucking broncoā behaviour of the Mini 4 Pro?
Iāve read that they can be ādazzledā by a low sun, and even come to a halt because of it.
Yes Dave @OzoneVibe , I suspect its something like that ā¦ as the drone pitches to stop, itās no longer dazzled, and so take the brakes off, gets dazzled again and on it goes.
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Never had the problem on my MP ā¦ usually have all sensors off, so that I am in control, not some software engineer in China.
Newly acquired s/h Mini2 doesnāt allow turning off the sensors ā¦ as far as I can see. 
Its doesnāt have the all around OA that the Mini 4 does, so shouldnāt have the same issue ā¦ I never had the problem with my Mini 2 in over 2-years - at the same place that I do now have this issue with the mini 4
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Not flown it enough to have any issues as yet ā¦ but I do recall this issue being mentioned way back on the original Mini with the forward facing OA in low sun conditions.
I must make a note to test flying toward a low sun. 
It is now fixed, downloaded updates, then re calibrated it, now it works fine, thank you all for contributingā¦happy flyingā¦
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I have done the update, but I didnāt recalibrate anything, and when I tried it, the problem persisted.
Based on my testing, Iām confident itās the OA thatās causing the jerky behaviour.
I tried bypass, nifty and braking, and they all had the jerkyness.
As soon as I turn off the OA, the problem disappeared.
Iāll do a recalibrate and see what happens 
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Seems like your not the only one with this problem just stumbled upon this video on a DJI forum ( whilst looking for something else )
Worth a quick read etc, maybe ignore the second video in the link as thatās referring to matey has only noticed since changing his props,
I did find quite another lengthy thread where some say maybe to much software crammed in a small drone or to that affect but sounds like to many cookās in the kitchen squabbling in that post.
Oh look - low sun! #WhodAThunk
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Thatās exactly the problem I am having. I got it the other day with the drone at about 10m, and it was misty (no low sun) ā¦ but wonder if the lack of contrast confused the OA?
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Thereās quite a few topics on DJI forums about this some call it waving rather than oscillating
Also there seems to be many saying OA bypass can cause it & a list of many other things so itās as good as anyoneās guess, drone / drones have been returned to DJI for replacement & apparently still the issue persists with that replacement I read.
Some in this DJI thread also mentions it but there is also a fair bit of stuff which has nothing to do with the problem but maybe worth a scroll.