I am stumped.

VERY SIMPLE KXTD816 in tenant service with a TVA50

No company greeting, only:
CS1 is tenant A
CS2 is tenant B
There is no night service or anything more advanced that I could see.

The problem began about 3-4 months ago.
All numbers ring on the right sides and get the correct CS greetings when called.

Attendant A (101) has no problems, but NOW several times per month attendant B (111) gets an odd message.

Here is where it gets weird.....

It is not an outside caller or internal extension, it ONLY plays the Custom service menu for tenant A with nothing else recorded.

It is almost as if someone on the A side called their own system, #6 bail out to the main greeting and VTR'd to 111 and let go before the recording began to play. The timing is too fast and no one there has skills.

I wouldn't have believed it except she kept the recording.

Went 2 rounds with tech and they are stumped too.

NSTIW..... Again bash

ANY clues would be appreciated!