HTTP Toggle request issue with Plus Wall Dimmer

Shelly Plus Wall Dimmer toggle http command doesn't seem to be working?

On and Off works, but Toggle does not. For example:

"http://ipaddress/light/0?turn=on" works.

"http://ipaddress/light/0?turn=off" works.

"http://ipaddress/light/0?turn=toggle" does not work.

Firmware version is 1.2.2.

Any ideas?