I have been bundling all bundleable resources for a few days now and have experienced this several times too. So far I have bundled the individual resource types as a workaround in the cases where it would not work at all. So I created a bundle for brush tips and one for presets and if there were other resources I also bundled them with the presets.
I noticed that when I create the bundle with the presets, the brush tips are also included in the bundle WITHOUT ADDING THEM!
Try this.
Create your bundle and add everything except the brush tips, but they must be present in the Brushes folder!
This is how you successfully create complete bundles with the release versions of Krita 5.
I had a “glitch” with a brush set where two presets had been given the same name, so the naming of the presets and not the filenames were the same. After I renamed one, the bundle creation worked here too.
It has worked that way for me since I discovered this.
Michelist
Note: This is mostly a computer translation, it is 4:20 in the morning I was lazy and tired, sorry.