Screensaver crashes when locking, changing users, and then switching back to the locked user

[Deauthorized]

 * Cinnamon-Screensaver version (cinnamon-screensaver --version) **5.2.1**
 * Distribution - (Mint 17.2, Arch, Fedora 25, etc...) **Mint 20.3**
 * Graphics hardware *and* driver used **Advanced Micro Devices, Inc. [AMD/ATI] Picasso**, it doesn't show a driver in the driver manager
 * 32 or 64 bit **64 bit**

Issue

Screensaver will crash, forcing the standard recovery method to unlock the desktop

Steps to reproduce

Lock your screen, and then switch to another user, then switch back to the user which is locked. It'll show the lock screen for a brief amount of time and then crash.

Expected behaviour

It doesn't do that

Other information
https://termbin.com/8j72

[Atalanttore]

I can confirm this error on Linux Mint 20.3.

Unfortunately, the displayed tips for getting back the desktop do not work either.