バグる
baguru

Godan Verb (ru)

1. to behave buggily (of software); to act up; to behave strangely

Intransitive
Colloquial
アドレス ちょうがバグってしまい、あなたのを ふくむたくさんのアドレスが えてしまいました。
adoresuchōga bagutte shimai anatanō fukumu takusanno adoresuga kiete shimaimashita.
There was a bug in my Address Book and many addresses including yours were deleted.