My 2019 cube stereo 150 rides very wobbly, to the point where it's outright dangerous on speeds above 40km/h. I pinpointed the issue to the lower bolt that connects the springed rear part of my bike (blue arrow):
Without the piece of zip tie, the rounded triangle can move up, down, left & right, but also rotate a lot:
I thought there might be a missing cap that should be locking that bolt in place, but seeing this video, it seems that he has the exact same protruding end of the bolt (albeit way cleaner):
Repair shop: I tried both a big repair shop and a local repair guy. Both didn't seem to have even found this issue. Only after I took matters into my own hands I noticed this.
Replace the components: I sourced & bought an entire kit with the same product ids (which you can see in the picture) and while it definitely was an improvement, there is still a dangerous amount of slack. This was the kit I bought (I bought 2, one as a spare). I don't think I had to use the blue tube though. That may indicate that I missed a step.
McGyver it: I added bits of zip-tie pieces, filled the gaps with glue and added some duct-tape on top of it to keep it in place. This actually worked not too bad, but the zip-tie plastic wears of rather fast. I think I should redo this procedure about monthly to be safe.
I would love to hear any better solution than the temporary zip-tie fix, preferably keeping my bike fully suspensioned. I was thinking something like strong sealant.