In our error reports I've noticed a lot of such errors, probably it happens when trying to process a large encrypted attachment:
RangeError: Maximum call stack size exceeded
at String.match (<anonymous>)
at PgpArmor.clip (chrome-extension://EXTENSION_ID/js/content_scripts/webmail_bundle.js:6475:32)
at MessageRenderer.processEncryptedMsgAttachment (chrome-extension://bnjglocicdkmhmoohhfkfkbbkejdhdgc/js/content_scripts/webmail_bundle.js:13918:45)
at async RenderRelay.processor (chrome-extension://bnjglocicdkmhmoohhfkfkbbkejdhdgc/js/content_scripts/webmail_bundle.js:13751:30)