Fields formatted as Bytes do not display units in range agg anymore

[jakommo]

Kibana version: 7.6.0

Elasticsearch version: 7.6.0

Server OS version: ECE 2.4.3

Browser version: Firefox 73.0.1

Describe the bug:
If a numeric field is formatted as Bytes in the index pattern, it shows up correctly with the unit in discover and other aggregations (i.e. it works for terms agg).

But when using a range agg, it's not displaying the units anymore

But this worked in 6.x. I.e. below screen is from 6.8.3:

This feels like a regression.

Steps to reproduce:
1.Index test doc

PUT test/_doc/1
{"my_bytes_field": 1024,"@timestamp": "2020-02-20T11:56:41.965Z"}

2. Create index pattern and configure this field as Bytes
3. Create a range agg on the field

[elasticmachine]

Pinging @elastic/kibana-app-arch (Team:AppArch)