CQ/Beacons not passing through digipeaters properly with VaraFM 4.2.5

After upgrading to 4.2.5 of VaraFM, CQ calls and beacons no longer pass properly through digipeaters. For example, I see this in the logs after I send beacons:

23/11/2022 03:32:44 - Sending beacon
23/11/2022 03:32:48 - KISS packet received
23/11/2022 03:32:48 - Async message received: To:VCHAT 0 From:I5MBP9N Data:@@??    

Similarly, calls from other stations are not interpreted properly (sending station here was KI5QPY):

23/11/2022 04:00:02 - KISS packet received
23/11/2022 04:00:02 - Async message received: To:VCHAT 0 From:I5QPY9N Data:@@??

Digipeater is running 4.2.3. Downgrading to 4.2.3 on my system allows the CQ/beacon calls to pass properly.