Crashing when putting encoded large pattern into a crafter.

using forge 2847
using more refined storage v2.2.6 (https://github.com/tth05/morerefinedstorage)
using RSLargePatterns-1.12.2-1.0.0.1

here's crash log. can be replicated by putting any encoded large pattern into a crafter.
https://pastebin.com/7APHNWF0
crash-2021-02-21_19.08.52-client.txt

edit: fixed in next release of backport. i'll close this.