To track down the frustrating random results of a double click dictionary lookup, I put the dictionaries at the very top of my priority list so their behavior is not affected by inadvertent inclusion of English or Spanish headwords in other resources.

I opened the NRSV and the RVR60 to 1 Cor 2:6 to provide example words.
1. I click on the adjective "mature" in the NRSV which requires no stemming and get the expected COED result:

2. Similarly, I click on the singular (dictionary form) sabiduría in the RVR60 and get the expected result:

3. I click on the plural "rulers" knowing I have had forms that require stemming bypass English dictionaries and go to Bible dictionaries or their equivalents. To my surprise it goes to the correctly stemmed form but in the Spanish-English dictionary ... bypassing the two English dictionaries that have higher priority. Clicking on other words such as "doomed" that also require stemming persist in going to MWSED

4. The behavior is identical in the Information Panel
5. However, if I test Spanish forms that require stemming such as "príncipes" or "hablamos" I continue to get correct entries from DGLEV.