Thingy:52 DFU 2.04

Any ideas?

When examining the 1.99 and 2.04 zip packages via nrfutil command I see one difference - the fw_version. For older 1.99 _app package fw is set to value 7, see below. v2.04 has it set to fw_version: 0x000000FF (255). Maybe it could make difference, maybe not. Otherwise it looks same for both. Required softdevice version is the same 0x8c= S132 3.0.0

$ nrfutil pkg display espruino_1v99_thingy52_app.zip

DFU Package: <espruino_1v99_thingy52_app.zip>:
|
|- Image count: 1
|
|- Image #0:
   |- Type: application
   |- Image file: espruino_1v98_thingy52_app.bin
   |- Init packet file: espruino_1v98_thingy52_app.dat
      |
      |- op_code: INIT
      |- signature_type: ECDSA_P256_SHA256
      |- signature (little-endian): 7f0399ea98381d2422df261c10376236d888f52c73bf370a2066c4b1d410f1dd72fff6fab493a091c0cd2fe57892c1c86965c35e382a8ce4d0584cb61c2095ca
      |
      |- fw_version: 0x00000007 (7)
      |- hw_version 0x00000034 (52)
      |- sd_req: 0x8C
      |- type: APPLICATION
      |- sd_size: 0
      |- bl_size: 0
      |- app_size: 253952
      |
      |- hash_type: SHA256
      |- hash (little-endian): fbb0f7848bdf4184e0254c56040636871fdc1216bd6184bb1ed18bfc7faba244
      |
      |- boot_validation_type: []
      |- boot_validation_signature (little-endian): []
      |
      |- is_debug: False