Crash when dropping image into canvas (recent regression)

Steps to reproduce:

This is a regression of !1715 (merged) (3274e7a1)

• open Inkscape
• drag JPEG from desktop into canvas (Image import type: Link)

What happened?

Crash

#0  SPLPEItem::notifyTransform(Geom::Affine const&) (this=this@entry=0x0, postmul=...) at ../src/object/sp-lpe-item.cpp:332
#1  0x00007ffff708d4f8 in SPItem::doWriteTransform(Geom::Affine const&, Geom::Affine const*, bool) (this=0x5555559abe30, transform=..., adv=adv@entry=0x0, compensate=compensate@entry=false) at ../src/object/sp-item.cpp:1534
#2  0x00007ffff7083338 in sp_item_group_ungroup(SPGroup*, std::vector<SPItem*, std::allocator<SPItem*> >&, bool) (group=group@entry=0x555557af3bf0, children=std::vector of length 0, capacity 0, do_done=do_done@entry=false) at ../src/object/sp-item-group.cpp:636
#3  0x00007ffff76d3db8 in file_import(SPDocument*, Glib::ustring const&, Inkscape::Extension::Extension*) (in_doc=in_doc@entry=0x7fffea44cc00, uri=..., key=key@entry=0x0) at ../src/file.cpp:1090

What should have happened?

No Crash

Inkscape Version and Operating System:

• Inkscape Version: Inkscape 1.1-dev (24c490d830, 2020-04-13, custom)
• Operating System: Arch Linux

/cc @jabiertxof