https://bugzilla.redhat.com/show_bug.cgi?id=1170135
--- Comment #4 from Pravin Satpute psatpute@redhat.com --- Summary of problem: Lohit Bengali is default font for Bengali language in Fedora. In its last upstream release (2.91.0) conjuncts were breaking when applying any matra after that. This issue persist in Fedora 21 Final release.
Any known workarounds: Fix is available with Zero day update (2.91.1). Issue has been fixed and just doing `$dnf update lohit-bengali-fonts` will solve the issue.
An assessment on the impact to Fedora users: Lohit Bengali is default font Bengali language. Whenever user will view any Bengali language content in Fedora he will face this issue.