While it’ll be most conclusive to wait for @1technophile’s debugging binary, one thing we can see from your screenshots is that @monkeypr00f has the temperature probe inserted into socket no.1, whereas @PapaLanc has it in socket no.2. So it doesn’t seem to be a probe/socket and corresponding decoding related issue.
Would both of you be able to monitor the MQTT output in MQTT Explorer for a while, to see if the same temperature jumps are visible there in the device’s MQTT history when they do occur in your HA history chart?
Great, on the left side expand the triangle for OpenMQTTGateway_ESP32_BLE and the triangle for BTtoMQTT, there you should see the IBT-2X among your one other BLE sensor.
On the right side you see its current value message, with red indicating the previous values and green the new values for the various changing values like temperature and also rssi.
Underneath you also see History with the number 9 (probably gone up by now) indicating how many messages have been received by that sensor since you started MQTT Explorer. If you expand the history you can click through each one of these historical direct messages which have been broadcast by the IBT-2X.
So if the jump shows up in HA it would be great to see which actual broadcast message in the Explorer history relates to it/them.
No worries. There is a little scroll bar at the right side of the history list, but don’t spend too much time on it.
That one screenshot with1319.7ºC and 2407.46ºF was actually very good, as it showed us that when this happens the two, far too high, temperatures for both probes, are exactly the same in these instances, whereas your last screenshot and even the previous small history glimps always showed slightly different temperatures for temp1 and temp2 ( e.g. 69.0ºC/71.4ºC)
It doesn’t solve the issue at hand just yet, a debug build will still be the best way forward to fully solve this, with additional manufacturerdata information for the occurrences, but that jump affecting both temperatures the very same is already helpful.
I’m also seeing that you have one of the xBBQ models, which was only recently added to the decoder. @monkeypr00f, is it the same for you, an xBBQ not iBBQ?
If I remember correctly these take AAA batteries instead of having a rechargeable built in battery, or is it the other way round?