RX signal suddenly drops

Lau

I am experiencing an issue with MSHV after updating to SmartSDR 4.2.18.
In MSHV, when I run FT8, my RX signal suddenly drops by approximately 15 dB.
When I then adjust the RX level back to 0 dB and transmit (TX), the RX level jumps up to +20–30 dB, and I have to manually reduce it again so the level is back around 0 dB.
Shortly after that — even without transmitting — the same thing happens again.
Before upgrading from 4.1.15 to 4.2.18, I uninstalled 4.1.15, rebooted the PC, and made sure there were no remaining traces of 4.1.15 before my Flex 6600M performed the radio update. Everything completed without any issues.
I have verified that this is not a LAN/network issue. I have also ensured that MSHV is correctly configured with the proper DAX RX and DAX TX settings — everything appears to work fine. However, I cannot determine where, or why, my RX level suddenly shifts between approximately −20 dB and +15 dB.
I am running Windows 11 (latest version and build — same for MSHV) on a Windows 11 Pro system with an Intel CPU and 16 GB RAM, in case that is relevant.
I would very much like to avoid having to reinstall my PC to resolve this problem.
Any suggestions would be greatly appreciated.
This post was translated by Copilot, as my technical English is not optimal.
Kind regards,
Lau
OV2B

Lau

BTW....!!
INFO… I also have an SPE Expert TAURUS connected to my setup. This is done via a USB CAT cable from the radio to the PA, which may be important information. However, I have not experienced the PA indicating “standby operation” or any loss of connection.