I use WDT in almost all my sketches, normally on 8 seconds.
Yesterday I uploaded a sketch I've used before onto a board to use with a LoRa wireless switch, and all of a sudden the WDT, if the dog is not patted, goes into a loop instead of resetting the board.
Tried with a different board, same thing. Tried with a simple sketch that only tests the WDT and nothing else, same thing.
The closest I got to finding a solution was to update the optiboot url in preferences / boards manager url to: https://github.com/Optiboot/optiboot/releases/download/v8.0/package_optiboot_optiboot-additional_index.json
Then install the latest version of Arduino AVR Boards to 1.6.23.
Still no luck.
Does anyone know what's going on?