Microsoft Defender flags Niagara Launcher as malware – false positive?

Today, Microsoft Defender on my Android phone suddenly detected Niagara Launcher as malware, identifying it as Trojan:AndroidOS/Wacatac.A!ml and recommending that I uninstall the app immediately.

A few details:

Niagara Launcher was installed directly from the Google Play Store.

App version 1.16.32 of Niagara Launcher.

Google Play Protect reports no threats.

Malwarebytes also reports no threats.

Microsoft Defender is the only security app flagging Niagara Launcher.

I'm using a Samsung Galaxy smartphone.

I'm aware that Niagara Launcher has previously been falsely flagged by antivirus software, possibly due to code obfuscation.

I've attached screenshots of the Microsoft Defender warning (german language).

Has anyone else recently received the same warning? Is this a known false positive, or is there something to be concerned about?