MOS 2.13.0+ BUG - drops sys.mount causing ext_fs to NOT MOUNT!

Did clean build on latest and found my ext_fs was not mounting for some reason … dug into this and found the problem is related to the 2.13.0+ versions of MOS, which for some reason is dropping (or not adding) the sys.mount defined in my mos.yml file.

Build using 2.12.1 and it works fine … so anybody using 2.13.0+ and trying to use ext_fs as defined in the docs:
https://mongoose-os.com/docs/mongoose-os/howtos/fs.md

It will NOT work.

conf0.json in 2.13.0+:

 "sys": {
  "atca": {
   "i2c_addr": 96,
   "ecdh_slots_mask": 12
  },
  "tz_spec": "EST5EDT4,M3.2.0/02:00:00,M11.1.0/02:00:00",
  "wdt_timeout": 30
 },

conf0.json in 2.12.1

 "sys": {
  "mount": {
   "path": "/data",
   "dev_type": "esp32part",
   "dev_opts": "{\"label\": \"data\"}",
   "fs_type": "SPIFFS"
  },
  "tz_spec": "EST5EDT4,M3.2.0/02:00:00,M11.1.0/02:00:00",
  "wdt_timeout": 30,
  "atca": {
   "i2c_addr": 96,
   "ecdh_slots_mask": 12
  }
 },