Hello Hendrik! It looks like LuisArturo came to the conclusion that the issue is likely rate related. This means that the cells will take a longer time to run due to the length of the input. However, it could also mean that they could time out if they take too long to run, causing them to error out.
Also, I went into your table and it looks like all the cells in the enrichment gave results as expected. Is there a particular one that is still not doing so?