CHIPTool app crashes on iOS for "Enable Pairing" mode

[phonnakasturi-apple]

With SHA 770a2e2

CHIPTool app crashes on iOS for "Enable Pairing" mode

Steps to reproduce:

1. Build first chiptool app on iOS
2. On a command line flash the M5 device
3. Pair the M5 board with CHIPTool iOS app via QR code or using the short pin code
4. Build and launch 2nd chiptool app on iOS
5. From first chiptool app, click on Enable Pairing
6. Select "Open Pairing Window" -> the app closes at this step

Attaching the logs from M5 board + from iOS device:
M5logs-enablepairingissue.txt
iOSlogs-enablepairingissue.txt

[woody-apple]

Possible error here:

2022-07-05 11:18:04.138050-0700  localhost CHIPTool[5987]: (Matter) [com.csa.matter:all] � [1657045084138] [5987:1096036] CHIP: [DL] Chip stack locking error at '../../../../../../../../../../../new_test/connectedhomeip/src/messaging/ExchangeContext.cpp:138'. Code is unsafe/racy

CHIP_ERROR ExchangeContext::SendMessage(Protocols::Id protocolId, uint8_t msgType, PacketBufferHandle && msgBuf,
                                        const SendFlags & sendFlags)
{
    // This is the first point all outgoing messages funnel through.  Ensure
    // that our message sends are all synchronized correctly.
    assertChipStackLockedByCurrentThread();

    bool isStandaloneAck =
        (protocolId == Protocols::SecureChannel::Id) && msgType == to_underlying(Protocols::SecureChannel::MsgType::StandaloneAck);
    if (!isStandaloneAck)