A phone, a laptop, and a desktop

Hi –

SyncThing is working wonderfully between my phone and my laptop, and between my laptop and my desktop, but not always between my desktop and my phone, and I can’t figure out why. I frequently see this error…

No connection could be made because the target machine actively refused it. (19:40:43)

…but sometimes there’s a connection with a halfway decent transfer rate, and sometimes nothing. Any help anyone could provide would be greatly appreciated!

Thanks, Brian