Since commit a772976f047882918d5386a3ef9226c4aa2aa118, when you enable "Ignore double spaces" under Tools->AutoCorrect->AutoCorrect Options once, you can't disable it again permanently. It gets disabled for the current session, but gets re-enabled after the program restart.
Thank you for reporting the bug. I can confirm that the bug is present in Version: 7.6.0.0.alpha1 (X86_64) / LibreOffice Community Build ID: 9366f83c88fc93d40ea0c0035508f24ad5dcb144 CPU threads: 8; OS: Linux 6.1; UI render: default; VCL: gtk3 Locale: en-US (en_US.UTF-8); UI: en-US Calc: threaded
https://gerrit.libreoffice.org/c/core/+/154958
Mike Kaganski committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/core/commit/89ccdd1b7be48461a33200c43b2fd340e646df8b tdf#156482: fix order in SvxBaseAutoCorrCfg::ImplCommit It will be available in 24.2.0. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.
Mike Kaganski committed a patch related to this issue. It has been pushed to "libreoffice-7-6": https://git.libreoffice.org/core/commit/2c4cd392cedf255ac9f1845c5345af8ef9540f19 tdf#156482: fix order in SvxBaseAutoCorrCfg::ImplCommit It will be available in 7.6.1. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.