The intermittent FCs have gone for me too, but I have found another problem. I tried a recording. Starting the recording from the widget worked fine. When I stopped it I got the expected "save" screen, changed the name, and selected OK. But now if I try to start Locus Free it shows the same save screen again (with the exact same default name with the same time in it, so it's not a new track). So I saved the track a second time. When I did that I briefly got a recording notification, and then Locus Free exited (no error messages, just an exit). If I look in Locus Pro, the first track is correct, but the second one has a time of 0h:0m:0s and a distance of 0m. I then tried going into Locus Free again, but I got the same save screen again! So I saved the track a third time, got the same brief recording notification, Locus Free exited, but this time no track was saved at all. After that, every time I started Locus Free I got the same thing. If I select "Cancel" instead of "OK". Locus Free also exits.
Next I started a new recording from the widget. It started recording fine (which surprised me a bit - I was expecting it to do something bad at this point!). When I stopped the recording it saved fine, as before (with a new default name, so it's now a new track). Then I could exactly repeat the sequence above, except that I managed to get it to save two additional 0h:0m:0s tracks rather than only one.