Signal Stores Deleted Messages Longer Than Expected: Bug Ignored for Six Months (heise.de)

• Deleted messages remain on Signal for days depending on usage.
• Signal ignored the bug for six months.
• A fix was only released after public pressure.

"A bug in Signal causes deleted messages to remain on devices for up to several days, depending on usage intensity. The company ignored the issue for six months before releasing a fix. The flaw undermines user privacy and trust in end-to-end encryption."