WSJT-X v1.9.1 WSPR Band Hopping - TX Tune (pretune) issue/bug?

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DG7RJ
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WSJT-X v1.9.1 WSPR Band Hopping - TX Tune (pretune) issue/bug?

Hi there,
I changed my WSPR Software from Visual WSPR v3.7 to WSJT-X v1.9.1

During band hopping (160/80/40/30/20m) the short tx-tune (pretune) function for the next receive band works fine and tunes my ATU nicely.

However, when coming from a transmit cycle (say 40m) and hopping to a receive cycle (say 20m) no or a very short tx-tune happens!? It seems there is no power output in this case - so my ATU will not tune.

My configuration:
Rasberry pi
Red pitaya
5W PA homemade
ATU Hamware AT 502
Quisk 4.1.3
WSJT-X v1.9.1 (which works very well except for the above mentioned issue)

Is there any adjustment or work around for this issue?

help would be very much appreciated!

73! Wolfgang