Category query search fails for one particular category in the group.

Description

This is a very weird issue. I have a template that performs a category query in the following fashion:
{% set platformCategory = craft.categories.group('categoryGroup').search(category).one() %}

I get the category variable from the current URL. I have a total of 4 categories in that group. This query works on all of them except for the last category in the group (I checked this dynamically and by hard-coding the queries).

After further inspection, I found that the three categories that work have neighboring IDs (14,15,16) and the one that fails is not a neighbor (28).

If you perform this query {% set platformCategory = craft.categories.group('categoryGroup').id(28).one() %} Craft will actually return a succesful response that will render the elements based on that category.

It's an extremely weird issue and I have no reasons to suspect this is a bug on my side since I have been able to make queries for 3 of the 4 categories. I already cleared my cache and search indexes with no success.

Please advice.

Steps to reproduce

See above.

Additional info

• Craft version: Craft Pro 3.0.14
• PHP version: 7.1.16
• Database driver & version: MySQL 5.7.19
• Plugins & versions:

No source file or test is identified in the report. Start by reproducing the category query from the template with Craft 3.0.14, comparing the failing category search with the successful id query and checking whether the search index is involved. Done means the category query returns the category with ID 28 and its elements render as expected.