Describe the bug
LowPower deepSleep not delaying application code at all.

To Reproduce
Examples > TimedWakeup

Steps to reproduce the behavior:

1. Compile
2. Upload

Changing the code to use sleep(..) instead of deepSleep(...) seems to work.

Expected behavior
Expecting this low power mode to delay application code.
TimedWakeup uses lowpower deep sleep to flash the LED at 1s/1s duty, but the LED just flickers as fast as possible with no delay.

Desktop (please complete the following information):

• OS: MacOS
• Arduino IDE version: 2.3.6
• STM32 core version: 2.10.1
• Library version: 1.4.0 (RTC @ 1.7.0)
• Tools menu settings if not the default:
• Upload method: STLink over SWD

Hardware (please complete the following information):

• Board option: Nucleo 64
• Board Name: Nucleo L053R8
• Hardware Revision: MB1136 Rev C
• Extra hardware used if any: None

Additional context
Stock out of the box Nucleo, clean Arduino env, clean library env.