A Modification Suggestion
I was calling CQ on slot 12. I received a connection request, it went through and we connected. Then we exchanged signal reports and they were excellent, they were a -04 and I was a +04. Then the other station sent a QSYU request. I don't know why, maybe he had some QRM, so I accepted. While I was accepting that they sent a link test. I had QSYed, that left my QSY acknowledgement in the out window. They never received it because of the link test that they were waiting for.
So a suggestion for the next update, if someone sends a QSY request, they can't send anything else until it is completed, maybe with a popup window that shows the QSY status as it proceeds. That would probably have been a good QSO, but it was lost because they stacked requests and it was lost in the QSYU. I have had several QSOs get lost in a QSY request that I accepted.
73s
KQ4QWH

No special documentation. introduced in V7.
If no packet is received (or sent) (partial chat packet or TL) the recovery sequence begins on both ends.
https://www.varac-hamradio.com/forum/varac-announcements/varac-v7-1-4-is-here-with-qsy-recovery-granular-alert-tags-auto-antenna-tuning-tcp-based-cat-and-more