Did some testing this morning. Testing was done using an RSPDX SDR as Identity 1.
The following method will replicate the issue.
On the 80m band add a second receiver to the display as per screenshot.
Access both receivers.
From the Favourites menu select WWV 10mhz then from the Favourites menu again select the 80 band
The second receiver display will have gone and in it's place the area will blank the cursor and when clicked will jump to the 30m band centred on 10mhz.
The same happens if multiple receivers are used on 80m and bands are changed using the Favourites menu, e.g. select 40 or 20m and return by selecting the Favourites 80m option.
If the same 80m band is selected and another bandwidth option selected from 80m Favourites the second receiver again disappears and the 10mhz jump behaviour is apparent.
The problem can be replicated on the 40m and 20m bands although not consistently the jump is still to the 30m band.
It appears that if a Band is selected above the band in use with multiple receivers, on return the second receiver will have disappeared and the blank cursor / Jump to 30m will occur.
If instead of returning to the band via Favouirites the Previous option (Counter Clockwise arrow on quick access toolbar) is used, boith receivers are retained on return and the blank cursor/jump to 10mhz doesn't happen.
Note that if the missing receiver is again added at any position on the display, the issue dissappears and if more than 2 receivers are added there will be multiple blank areas.
Why it jumps to the 30m band I can't determine.
Hope this helps.

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