HP6032e online, Smart App says online but I'm getting a new Printing pop-up that says it's 'Unknown'

This is driving me mad! I have an Envy 6032e that was fine for years, but the last six months seems to be going into some sort of spasm. I try and print, the usual print box comes up asking Layout / Pages / Colour / single sided etc. I click on Print but now a new HP Smart Printing box comes up. (When I say 'new' this never popped up until a few months ago) This tells me my printer is 'unknown' and print is greyed out. I can only select 'Change Printer' but my 6000 series isn't there. It says 'No printer found'. However, if I click on the HP Smart app my printer is there and is active.  There is a button that says 'Always show before printing' and I have tried deselecting this but it just comes back regardless. Once at this point I can't print at all as the only option is to close the box and my printing is cancelled. Why am I getting this extra Print box? It just randomly started coming up (I'm assuming after an upgrade?). This is at the end of a long period in which I've had multiple issues with this, so I've deinstalled, installed etc multiple times. What is going on here? Does anyone know of a simple solution both to this problem and as to why my printer constantly loses connection to my PC over Wi-Fi?