When providing a specific string to discv5.ENR.decodeTxt function, an Assertion 'val->IsArrayBufferView()' failed. are triggered. This issue seems to be related to BigInt and sometime can trigger a SyntaxError: Cannot convert 0x",\,X, instead (see here)
This bug has been found by the community using beacon-fuzz and reported in our repository here. Kudos to @Daft-Wullie for the finding !!