Brother_MFC-J5330DW intermittently unavailable on wireless network, might WICD help?

(Having read the rules for the network forum this didn't seem to fit, hopefully this is the right place to post - sorry in advance if it's not.)

I am having intermittent problems in accessing my Brother_MFC-J5330DW multi-function inkjet. Often (especially if I'm in a hurry) a print job will just sit in the print queue and the message "In use -"Unable to locate printer."" appears under the name of the printer itself. I've had the same problem on the same computer in Mint Cinnamon 19.3, Ubuntu 20.04, and now in Kubuntu 20.04. Any time I think I've fixed it a day passes and the problem reappears. Sometimes reboots (printer and PC) fixes it, sometimes not.

In my current distro I've tried disabling the automatic printer detection of cups-browsed and assigning a static ip address to the printer in my router. I used that static ip when installing the printer and scanner manually. The printer configuration shows the connection as

dnssd://Brother%20MFC-J5330DW._ipp._tcp.local/?uuid=e3248000-80ce-11db-8000-3c2af4c206e4

I am now wondering if Network Manager isn't playing nicely with my hardware (details below), having come across posts saying that network manager can be "flaky" and suggesting replacing it with WICD.

So would a switch to WICD likely be worth trying?

Thanks

My PC is an Intel NUC8i5BEH Output of lspci:
NUC8i5BEH:~$ lspci
00:00.0 Host bridge: Intel Corporation 8th Gen Core Processor Host Bridge/DRAM Registers (rev 08)
00:02.0 VGA compatible controller: Intel Corporation Iris Plus Graphics 655 (rev 01)
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
00:12.0 Signal processing controller: Intel Corporation Cannon Point-LP Thermal Controller (rev 30)
00:14.0 USB controller: Intel Corporation Cannon Point-LP USB 3.1 xHCI Controller (rev 30)
00:14.2 RAM memory: Intel Corporation Cannon Point-LP Shared SRAM (rev 30)
00:14.3 Network controller: Intel Corporation Cannon Point-LP CNVi [Wireless-AC] (rev 30)
00:16.0 Communication controller: Intel Corporation Cannon Point-LP MEI Controller #1 (rev 30)
00:17.0 SATA controller: Intel Corporation Cannon Point-LP SATA Controller [AHCI Mode] (rev 30)
00:1c.0 PCI bridge: Intel Corporation Cannon Point-LP PCI Express Root Port #1 (rev f0)
00:1c.4 PCI bridge: Intel Corporation Cannon Point-LP PCI Express Root Port #5 (rev f0)
00:1d.0 PCI bridge: Intel Corporation Cannon Point-LP PCI Express Root Port #9 (rev f0)
00:1d.6 PCI bridge: Intel Corporation Cannon Point-LP PCI Express Root Port #15 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Cannon Point-LP LPC Controller (rev 30)
00:1f.3 Audio device: Intel Corporation Cannon Point-LP High Definition Audio Controller (rev 30)
00:1f.4 SMBus: Intel Corporation Cannon Point-LP SMBus Controller (rev 30)
00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Point-LP SPI Controller (rev 30)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (6) I219-V (rev 30)
6d:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983
6e:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS522A PCI Express Card Reader (rev 01)