That’s the issue. I really can’t find one.
2 streams that cause this problem have only one “must contain“ rule with only [A-Z_]
Example: source must contain THIS_TEXT
So they are really close to being as simple as they could be from my understanding. Much more complex regex stuff does not cause a problem.
hobs’ solution of just exporting all mongodb contents and the importing them seems promising:
At least the streams all seem to be there and complete.