Audio recording in Fairlight is silent

I regularly add voiceovers while editing in Resolve, however now after re-installing Windows and Resolve to do a SSD upgrade, I am not able to record any audio into Resolve. My interface (Behringer 404 HD) is recognized and playback works perfectly. I can select the input channel, patch it to the track in Fairlight, and see the signal coming in on the interfaces meters, but resolve records absolute silence.

This is not the same issue I've seen where the recorded track disappears after recording due to a sample rate mismatch, it simply records an audio track which is totally silent.

After discovering the issue, I opened Pro Tools and Ableton Live and recorded perfectly. So the devices clearly work, just not with Resolve.

Here are the full specs:

Intel i7 7820x
Asus GTX 1070 Dual
Asus X299 Prime-A motherboard
32GB RAM
Samsung 970 Evo 500gb SSD
Windows 10 Pro

My audio interface is a Behringer UMC 404 HD. I've been using this setup for years with no issues at all until updating.

I have also tried this with a Tascam US800 and Behringer Q802 USB with similar results.

I get such a similar problem.
I want to use Logic Pro as a sampler in order to send sounds into Resolve (Fairlight). I use for this Soundflower, which is a virtual audio patch.
I give to Logic Pro Soundlower as audio output.
I give to my Fairlight track Soundflower as audio input (note that this is possible only if Soundflower appears to be your system audio input, because Fairlight only shows the system audio input...)
The audio output is Behringer FCA1616
I try to record sounds played by Logic Pro. It doesn't work
I do the same using Quicktime player. It works (I have to launch QT player first, then Resolve)
That means that audio inputs in Fairlight really have to be corrected in order to work. I noticed a lot of situations which don't have rational explanations relative to recording sounds in Fairlight.
In your case, try to shut down your computer and re-launch Resolve... Sometimes, I experimented that it works, but just a few time.
Fairlight is really the weak point of Resolve, and will get us out from this (theoretically) fantastic app...

Same issue here. I was getting stutters and glitches so I changed my sample rate in windows experimentally for input and output to 44.1 and then back to 48. Have restarted machine several times but...

I’m completely unable to get any sound into DR now. Buffer settings make no difference. All I can hear when selecting record on a track and the monitoring mode is active is a short buffer sized looping audio segment which is a recording of me clicking my mouse through my VO mic. So weird. This is actually recorded into the file too when pressing the record button. All other audio apps work fine - Cubase Pro tools Soundforge Audacity etc.

Win 10 1909 128gb RX570 6 SSDs 2xNVME external RAID
MOTU ULTRALIGHT MK 4 (2 units tested with exactly the same results)

Is this a DR17 bug? Here is my other post with the stuttering / garbled issue prior to my experiment changing sample rate. viewtopic.php?f=36&t=134383&p=726009#p726009

Pro Tools uses ASIO drivers, Resolve does not. I don't know about Ableton.
I will share my experience with audio.

I have a Behringer 1204 usb mixer as the audio interface running its own WDM driver. It is selected in both audio tabs of the Windows Sound menu. It is also set up in Resolve Preferences Input/Output using the Manual settings.

When recording with a project that has Fixed Bus routing everything connects and recording and playback work without problems.

If I use a project with Flexi Bus routing, no matter what I try to connect, I cannot get the audio in to Resolve. Now, this may be a problem with Flexi Bus or me, I don't know.

The one thing I will say is that unlike some users, I have never had any distortion, stuttering, or track skipping of the audio take place.

If you want to try the Behringer driver, it is here in my Dropbox account.
https://www.dropbox.com/sh/8uv2jvrk59ut07i/AACmoqM4Se5iNdcoa68IL1ida?dl=0