tagged_with searches and inconsistent case sensitivity

[tekniklr]

• acts-as-taggable-on (5.0.0)
• rails (5.1.4)
• activerecord-oracle_enhanced-adapter (1.8.2)
• ruby 2.4.2

When searching using Model.tagged_with('Tagname'), nothing is returned, despite these taggings existing. Comparing the SQL generated with Model.tagged_with('Tagname', any: true) revealed why- the latter forces lower case in SQL, the former does not. Since the actual tag name is capitalized in the database, it can never be returned in search without searching for any.

without any: true (incorrectly case sensitive):
SELECT "NOTES".* FROM "NOTES" INNER JOIN "TAGGINGS" "NOTE_TAGGINGS_8D57F90" ON "NOTE_TAGGINGS_8D57F90"."TAGGABLE_ID" = "NOTES"."ID" AND "NOTE_TAGGINGS_8D57F90"."TAGGABLE_TYPE" = 'Note' AND "NOTE_TAGGINGS_8D57F90"."TAG_ID" IN (SELECT "TAGS"."ID" FROM "TAGS" WHERE "TAGS"."NAME" LIKE 'concerns' ESCAPE '!')

with any: true (no case sensitivity- everything is lowercased in SQL):
SELECT "NOTES".* FROM "NOTES" WHERE (EXISTS (SELECT * FROM "TAGGINGS" WHERE "TAGGINGS"."TAGGABLE_ID" = "NOTES"."ID" AND "TAGGINGS"."TAGGABLE_TYPE" = 'Note' AND "TAGGINGS"."TAG_ID" IN (SELECT "TAGS"."ID" FROM "TAGS" WHERE (LOWER("TAGS"."NAME") LIKE 'concerns' ESCAPE '!'))))

Running the first query in a SQL console and changing SELECT "TAGS"."ID" FROM "TAGS" WHERE "TAGS"."NAME" LIKE 'concerns' ESCAPE '!' to SELECT "TAGS"."ID" FROM "TAGS" WHERE (LOWER("TAGS"."NAME") LIKE 'concerns' ESCAPE '!' works as expected.