Zotero for iOS. Crash ID: 1751331873
Got this automatically when accessing / re-opening Zotero iOS after locked home screen on an iPad. Nothing dramatic happened and I was able to access an attached PDF after a few attempts. I hope this helps.
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dstillmanedited April 21, 20221.0.3, which fixes a few crashes, is out now, so you can try updating to that.