Tasmota Matter over Wifi - Joining to Hubitat fabric fails. Has anybody got it to work?

Bought a couple Athom ESP32-C3 plugs pre-loaded with Tasmota: https://www.athom.tech/blank-1/tasmota-esp32-c3-au-plug-v3

So I could test Matter: https://tasmota.github.io/docs/Matter/

I can commission it using either Smart Life (Tuya white-label app on Android) or ESP Matter on iPad. Put the device into Matter sharing mode and it will either of the other Android/iPad apps, but it will not join Hubitat. Weblog outputs:

Successful commissioning with ESP Matter on iPad:
10:42:47.333 CMD: weblog 2
10:42:47.335 RSL: RESULT = {"WebLog":2}
10:42:52.616 CMD: mtrjoin 1
10:42:52.620 MTR: Manual pairing code: 31226553726
10:42:52.628 RSL: RESULT = {"Matter":{"Commissioning":1,"PairingCode":"31226553726","QRCode":"MT:Y.K90SO527M3H03QW10"}}
10:42:52.967 RSL: RESULT = {"MtrJoin":"Done"}
10:43:15.713 MTR: New Commissioning (PASE id=33443) from [fe80::1c4f:d152:2fb4:ae99%st1]:57832
10:43:21.082 RSL: RESULT = {"Matter":{"Commissioning":0}}
10:43:22.645 MTR: New Connection (CASE id=15816) from [fe80::1c4f:d152:2fb4:ae99%st1]:57832
10:43:23.379 MTR: =Saved 0 fabric(s) and 0 session(s)
10:43:23.546 MTR: =Saved 1 fabric(s) and 1 session(s)
10:43:23.585 MTR: --- Commissioning complete for Fabric '0000000000000001' (Vendor 0xFFF1) ---

Success adding to Tuya fabric using Smart Life on Android:
0:43:53.346 CMD: mtrjoin 1
10:43:53.351 MTR: Manual pairing code: 31226553726
10:43:53.356 RSL: RESULT = {"Matter":{"Commissioning":1,"PairingCode":"31226553726","QRCode":"MT:Y.K90SO527M3H03QW10"}}
10:43:53.694 RSL: RESULT = {"MtrJoin":"Done"}
10:44:17.886 MTR: New Commissioning (PASE id=18069) from [10.0.0.213]:20370
10:44:24.190 RSL: RESULT = {"Matter":{"Commissioning":0}}
10:44:26.088 MTR: New Connection (CASE id=55012) from [10.0.0.213]:20370
10:44:26.710 MTR: =Saved 1 fabric(s) and 1 session(s)
10:44:26.905 MTR: =Saved 2 fabric(s) and 2 session(s)
10:44:26.942 MTR: --- Commissioning complete for Fabric '0000000000A79C54' (Vendor Tuya) ---

Failed to add it to Hubitat Fabric:
10:44:52.539 CMD: mtrjoin 1
10:44:52.544 MTR: Manual pairing code: 31226553726
10:44:52.549 RSL: RESULT = {"Matter":{"Commissioning":1,"PairingCode":"31226553726","QRCode":"MT:Y.K90SO527M3H03QW10"}}
10:44:52.891 RSL: RESULT = {"MtrJoin":"Done"}
10:45:08.440 MTR: New Commissioning (PASE id=20543) from [fe80::36e1:d1ff:fe80:b494%st1]:58287

Hubitat WebUI sits there on on this screen indefinitely:

The devices are on the same LAN and I have successfully added a uascent Matter over WiFi RBGW globe to Hubitat fabric previously using the same sequence.

Anybody had and success with Tasmota Matter over WiFi or got any tips?