System specs: MacBook Pro (Retina, 15-inch, Mid 2015) • GPU Intel Iris Pro 1536 MB • OSX 10.14.6 • Illustrator 23.1.1

I have an Illustrator file (attached) which is originally imported from a dwg file but doesn't seem to contain that much artwork. Trying to open this file (or preview) with GPU either hangs Illustrator or takes minutes on end to render. The same thing happens if this file is placed in Indesign and GPU preview is on there, even recovering that document after force quitting hangs Indesign.

I can simply work around this problem by disabling GPU performance from prefs (or alternatively switching to preview on CPU, but then I need to initially open the file with GPU preview, which might hang the program). Just thought this info might be valuable for debugging.