Unclear if any impact, but just noticed a handful of these in logs:
[Exception ErrorException] (/srv/mediawiki/php-1.35.0-wmf.16/extensions/OATHAuth/src/Key/TOTPKey.php:188) PHP Notice: Undefined offset: 8 #0 /srv/mediawiki/php-1.35.0-wmf.16/extensions/OATHAuth/src/Key/TOTPKey.php(188): MWExceptionHandler::handleError(integer, string, string, integer, array) #1 /srv/mediawiki/php-1.35.0-wmf.16/extensions/OATHAuth/src/Module/TOTP.php(92): MediaWiki\Extension\OATHAuth\Key\TOTPKey->verify(array, MediaWiki\Extension\OATHAuth\OATHUser) #2 /srv/mediawiki/php-1.35.0-wmf.16/extensions/OATHAuth/src/HTMLForm/TOTPDisableForm.php(56): MediaWiki\Extension\OATHAuth\Module\TOTP->verify(MediaWiki\Extension\OATHAuth\OATHUser, array) #3 /srv/mediawiki/php-1.35.0-wmf.16/includes/htmlform/HTMLForm.php(694): MediaWiki\Extension\OATHAuth\HTMLForm\TOTPDisableForm->onSubmit(array, MediaWiki\Extension\OATHAuth\HTMLForm\TOTPDisableForm) #8 /srv/mediawiki/php-1.35.0-wmf.16/extensions/OATHAuth/src/Special/OATHManage.php(187): MediaWiki\Extension\OATHAuth\Special\OATHManage->addCustomContent(MediaWiki\Extension\OATHAuth\Module\TOTP) #9 /srv/mediawiki/php-1.35.0-wmf.16/extensions/OATHAuth/src/Special/OATHManage.php(100): MediaWiki\Extension\OATHAuth\Special\OATHManage->addModuleHTML(MediaWiki\Extension\OATHAuth\Module\TOTP)
brennen@mwlog1001:/srv/mw-log$ grep -c 'TOTP' ./error.log 48