adjective
buggy
BUG-ee/bˈʌɡi/
Containing errors that cause software to work incorrectly.
The buggy software displays overlapping windows and broken images.

Etymology
Buggy originally meant infested with insects. The later use of bug for a mechanical defect—perhaps imagining an insect in the works—makes buggy software figuratively full of troublesome faults.
In context
the interfaces are quite buggy there's a lot of difficulties there
More examples
- The update was buggier than the earlier version.
- They fixed the buggiest features.
- A buggy release frustrated users.
Forms
buggy · buggier · buggiest
Similar words
- faulty
- Faulty includes hardware and other failures beyond software defects.
- unreliable
- Unreliable describes inconsistent performance rather than its cause.