There is a small change here in XF 2.2 as we move to the latest version of the JoyPixels emoji-toolkit, and this is a side-effect of changes and fixes in that library.
The actual character in the signature is ⚙ rather than the emoji ⚙️.
We only convert ⚙️ to
There was some semi-deliberate, over-zealous coercion of certain unicode characters into a full emoji to handle some weird cases in XF 2.1 which are no longer required so some adjustment may be required.