So far We cannot reproduce this issue on our side.
Is it USB tethering or Android Debug Bridge cable connection?
For further analysis, could you please send us the diagnostic logs of your primary machine.
Just open the spacedesk Driver Console -> Diagnostics -> click Save All Information.
PS: Saving all information will take a few seconds, then please send us the whole folder which contains all the diagnostic logs collected.
Please right-click the folder -> Send to -> Compressed (zipped) folder, then attach the *.zip file in your next reply.