Bug in the "hammer" tactic with parallel proof processing in CoqIDE (minor)

[richardDap]

Coq version: 8.12
Operating System: Ubuntu 20.04
interface: CoqIde (8.12?)
the problem occurs for any lemmas.
Code example:
Lemma not_True : (~ True) = False.
Proof.
hammer.
Qed.
which generates the following error:
CoqHammer bug: please report: Not_found
I am working in classical logic with proof irrelevance (Coq.Logic.Classical_Prop and Coq.Logic.PropExtensionality libraries)
Does anyone has an idea of what is wrong?
Thanks in advance.

[lukaszcz]

This seems to be related to issue #64 but now it is in "hammer" instead of in "sauto". The "CoqHammer bug: Not_found" error occurs when trying to compile a whole file in CoqIDE which contains invocations of the "hammer" tactic. This is a minor issue because one should not leave the "hammer" tactic in files in the first place - one should immediately upon success replace "hammer" with the reconstruction tactic shown in the response window.