Kanji Reading should accept stem.

[morgenman]

As seen below, 乗(る) is pronounced のる. In the dictionary this is written as の.る, with a period separating the pronunciation for the stem and the rest of the word.
Expected outcome: typing the pronunciation for just the stem should be accepted.

[Doublevil]

I don't know. Other users might want it to only accept the whole thing ("の.る" and not just "の"). This is why you can edit the card to change the accepted readings/meanings.
Admittedly, a setting to add only the stem part to the accepted readings by default when adding a kanji card would save some time in your scenario.