Ble RX, after 30 secs, try to save and have the "M0 Guru Meditation" Message: "System halted" ... Press DFU ...

[NanoFile]

Describe the bug.

Hi,
I've been starting using the Ble Rx fonction and it look like after 10 founds MACs, if I try to save as CSV file, it crash.
If it is just 5 or 6, it's fine.
Here are pictures,

I click on "Export CSV":

Enter any name , then press "OK" :

Hope that help.
Richard.

Reproduction

1. Select Ble Rx.
2. Wait for few received devices, more than 5 or 6.
3. Click on Save as CSV
4. Give a quick name.
5. Click on "OK".
6. Get the error ""M0 Guru Meditation" Message: "System halted" ... Press DFU ... "
7. Press "DFU" give the Stack Dump on the screen.
8. Press Reset button to reset device.

Expected behavior

1. Should save .CSV file to SD Card and return to main screen.

Environment/versions

Firmware version 2.1.0

Anything else?

This looks promessing to review Bluetooth device around.