Please help - Strange echo on Audio Tracks

Today all was ok for about 6 hours and then it started again
I notice it immediately because the echo of the kick clashes with everything I have on side chain and throws it all out
I have switched it off for a while to see if it resets
Total pain in the butt

I have attached a WAV file so you can hear what I mean
I changed the extension to ZIP so just change it back to WAV - why are WAVs not on the list ???
You will hear the echo better in really clear headphones
It’s impossible to mix with this is on every track all the time
Any help appreciated
echo problem.zip (413 KB)