[amsat-bb] Rather frustrating AO-27 pass

I usually have no problems working AO-27 but a few minutes ago during the 2100 UTC pass over DM04 the pass started out with telemetry, some odd beeping and what sounded like packet. The pass was from south to north so like usual Spanish comms were heard but as AO-27 approached max elevation instead of getting a loud signal the bird went quiet and a few seconds later I found it jumped 10 kHz. I tried calling CQ and stations directly but apparently no one heard me. For those of you on at that time was I getting into the bird at all?