That's nothing new by any means Biel, seemingly you just had no clue about RADing properly lol. When stuck at 260'ish km/h, just lower/raise the bike a tad (just like you were avoding a regular road bump) and your acceleration will be fine again. You don't need to shift down a gear and no, it doesn't always happen on big runups. In fact it seems to be randomly occuring, regardless of where you're at. Anyways, that's not really what MMM talks about.
On-topic:
I know that feel bro, but I don't think it's any sort of bug. I happen to experience both possibilities during one spot session. Unbroken finisher might be a good example, sometimes I can reach the railing with no road bumps at all and sometimes it feels like every single one kicks me off.
Personally I think it's just certain variables that determine whether you pass a road bump or not: FPS, steering/angle, height of the RAD, bike speed & the collision models obviously. My assumption is the placebo effect being present whenever those variables decide to be bitches a few times in a row. Having an unknown bug toggle for road bumps being more bumpy seems a bit absurd to be honest. But who knows, I might be wrong too.
Off-topic:
What I hate even more is when you try a new spot, get close within a few tries and then never again. Shit's mental at times :<
