Issue Summary

Rules trigger inconsistently with conditions like this: "when the description of a card with description not containing x, contains y, add the purple label to the card"

Steps to Reproduce

1. create a rule with the condition in the summary (i was able to replicate 
2. open a card and add "x y" to the description
3. remove the label, if it is applied
4. edit the description, and add just "y"
5. remove the label, if it is applied
6. continue in this manner, removing one letter or the other to see if the label is applied or not

Expected Results

The rule triggers every time, checks the card to see it matches conditions, and then does not process if the description contains X.

Actual Results

Results are inconsistent. In testing, I saw the following:

1. Rule triggered correctly
2. Rule triggered and moves on to the action step when it shouldn't
3. Rule doesn't trigger when we expect it would
4. Other times it records this to the log: "Requesting card to check trigger condition(s)."

Workaround

Split the rule into two separate rules instead of one trigger that contains contradictory conditions.