Wrong sequence range after fetch of PDB 1EMS

Fetch 1EMS from PDB.
This has 2 chains (A, B) of length 412, 411 respectively.
Jalview shows sequence limits for both as /10-440.

In 2.10.2b1 these do at least load and display (and indeed back to 2.8 and probably beyond).
In 2.10.3/develop this results in an ArrayIndexOutOfBounds exception before they are displayed.
The exception occurs in the (new) Sequence.findFeatures(fromColumn, toColumn) method - but the root cause is elsewhere.