parsing issues with converted transducer

`hfst-proc` behaviour (expected):
```
$ echo "с." | hfst-proc sah.automorf.hfst
^с./с.$
$ echo "с.1" | hfst-proc sah.automorf.hfst
^с./с.$^1/1/1/1+э$
```

`lt-proc` behaviour (second one is unexpected):
```
$ echo "с." | lt-proc sah.automorf.bin
^с./с.$
$ echo "с.1" | lt-proc sah.automorf.bin
^с/*с$^./.$^1/1/1/1+э$
```

Specifically, `с.` doesn't receive an analysis above; instead the `.` alone receives an analysis. My expectation is that the parsing would be LMLR, but it seems to be something else?