"Log work" ignores decimal separator

When using the "Log work" feature, Jira will ignore comma as decimal separator, thus "7,5" is registered as "75".
If this situation is not caught before the next day, the burndown chart will look very inacurate and have reduced value.

I would like to see such input either accepted as decimal separator OR treated as an invalid input.

Step to reproduce:

1. install JIRA
2. set the default language to English
3. create issue and log work using "7,5h"
4. (bug) 75 hours will be logged into the issue

Desirable result: 7.5 hours to be logged on or JIRA throws ERROR indicating invalid input