I recently discovered this project which solves the Bluetooth limit of my Inkbird IBT-2x thermometer, but there is something I can’t explain with my integration with HA. Looks like it adds each value to the previous one in an incremental way…
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.