notifications – Huawei P20 Pro Random Beeps Oven

So this morning, my Huawei P20 Pro, for reasons I do not understand (I did not make any changes or enable / disable notifications), started to make 4 random beeps each time I lock or unlock the phone, with about 2 or 3 seconds between each beep.

In addition, this is sometimes produced when using the phone and it does not seem to make any noise every time I lock or unlock. Probably about 80% of the time, it does so when it is unlocked / locked.

Here is a link to the sound.

Any help on this subject would be immensely appreciated.