ssh kills "while read"

Question

I have a really confusing error, in the following script. reservations is just a file with 100 lines, let's say something like this:

apple
pear
fruit
...

cat reservations | while read LINE;
do
  echo $LINE
  for i in {0..2}; do
    ssh -o ConnectTimeout=10 admin@render rm -rf /tmp/lock$i
    echo $i
  done
done

(This is already a simplified version of a production script.)

Now, what I would have expected, is to see an output like this:

apple
0
1
2
pear
0
1
2
...

BUT, I only get the first line, i.e., the output is

apple
0
1
2

If I remove the ssh, everything works! For some reason, the ssh messes up the whole thing, and exits the while loop. I have absolutely no idea why that is!!