Can you confirm that the PL47 and the E07 use the same tube?

If 0.8mm really makes the difference, then that’s definitely a failure in tolerances. The only reason springs exist in a flashlight is for accommodating variances in cell length1. If they’ve failed to do this, then that’s a design flaw plain and simple.

1 - Yes I realize springs do also provide some shock absorption but that's not their primary purpose.