Issue Summary

Using the keyword search to search for partial words, for example, within a custom field, doesn't consistently return related cards.

Steps to Reproduce

1. Create cards with several custom fields e.g. A123, A124, A125
2. Use the board filter and in the keyword search, type in partial keywords of the custom field, such as 123

Expected Results

All related cards return

Actual Results

(Intermittent issue) Not all related cards appear

Workaround

Search from the beginning of the word, which should return expected matches. E.g. cards with custom fields A123, A124, search for A12 versus 12.