Hanlon’s Razor says to never assume malice where stupidity suffices as an explanation. The only way I read this sentence is to say that Hanlon’s Razor applies here, in-spite of how malicious the bug looks.
Same for me. While others argue that it's "obvious" that the author believes much more strongly that this find is a backdoor and not a dumb mistake (a very easy one to make for a non-cryptographer programmer), I am still unconvinced.
Would be curious to read a statement from Telegram's team though -- not that any team would ever admit to putting a backdoor...
