Experiencing dropouts when using click track

I’m using Audacity version 2.3.2 on Windows 10 and a Tascam audio interface. Recording is fine with just one track but when I try to record a second track I’m experiencing dropouts. I’ve changed the default sample rate to 16 bit and I’m still getting the same problem. Programme is saving to my hard drive and there’s plenty of storage. Any ideas?

Change the default sample format back to 32-bit float, and try changing the sample rate in the Windows Sound settings for the recording and playback devices to “44100” (the same as Audacity’s default).