I had the same using Tidal through the WiiM interface, but no clicks when I switched to using Tidal Connect directly with the WiiM. I guess it´s a WiiM software issue, so hopefully easy fixed. WiiM works fine with Tidal Connect so no loss.
I´m using the DAC in the WiiM Pro going straight to a power amp, and I get pops between tracks using the WiiM interface, but not when I use Tidal Connect directly to the WiiM.