T46g EXP40 - BLF not updating after intercom

[blistovmhz]

We have ~100 T46G handsets connected FreePBX.
Our reception phones are T46G with 4x EXP40 units. All 4x EXP40's are configured to monitor our handsets status.

Everything works fine until someone uses the Intercom/Page to page >80 phones. When this occurs, all BLF's on the EXP40's turn red (indicating all phones are currently in use, which is expected), but when the page ends, some BLF's never change back (remain red), regardless of the actual status of the phone.

I've confirmed that Asterisk is reporting that all the phones are now available, and confirmed that this data is being sent to our Reception phone, but the Reception phone seems to get confused at this many BLF updates and simply ignores 3 or 4 almost every time.

I originally thought it may be network congestion so I switched everything over to TCP, but we have the same result.

Anyone have the same issue, or anyone have ~100 BLF's on 4X EXP's working correctly during a page?