Please fix bug

Previously, this was the BEST alarm clock. I had the free app and then upgraded and since then (past few months) it has been unreliable. The alarm sometimes doesnt go off. Ive watched the time Ive set it to go by without the alarm sounding numerous times. Its also been hard to turn off without deleting the alarm. The alarm sound seems to change on saved alarms without me changing it. I have to set other alarms now but still set this one in case it works because it previously was so good but wouldnt recommend this now as its not reliable. Please fix this bug!

mganda about Loud Alarm Clock PRO Sleep +, v4.5