My educated guess is that those kind of "bugs" are likely not much of an issue forum folks tend to worry too much and read into things too much too early...
On AVF and AVSF, there have been tons of posts with many "experts" (backed by their number of posts and seniority), claimed and told people why they need to manually enter the distance to correct the D+M error due to using 300m/s instead of 343 m/s and then those who followed report back how their "sound", like imaging and whatever..got magically fixed..., I am not exaggerating, just read some foo those posts in you have nothing better to do and want a good laugh.
Audyssey, presumably they know better than us forum members, has stated repeatedly that (just one example below):
November 18, 2011 12:06
Yes, the distance measurement is actually a delay setting. The idea is to get the signal from all speakers and subs arriving at the same time for the main listening position
(where you place the mic for the first measurement). This is how they have the system set up in the studio during the mix.
I have yet to see on single post from those on AVSF and AVF about why they thought the speed of sound use have to be so exact, if the goal is just to have the sound signal from all speakers and subs arriving at the same time, and many of them do seem, or claim to know Audyssey, D+M actually measure the delays, not distance.
I did try to convince one such poster, and he started trying to explain things in circulator logic, with no quoted contents from those in the know such as D+M, and Audyssey themselves.
In the early days, one poster actually quoted Denon support, stating that this speed error thing is just that, but not a bug.
UPDATED. Audyssey Time Alignment Correction in Denon and Marantz AVR's and AVP's. Plus info about Loudness Management Settings. | Page 3 | AVForums
That poster appeared to have been ignored since (not to him but to the quoted Denon response), in fact you get an "established member" follow up post like this:
"That response from Sound United is disgraceful if it came from an actual engineer.
I get the feeling their hardware can only do basic calculations in the area it calculates the channel delays, so they use a rough approximation of distance to time. "
Pretty sure this established member himself, is not an engineer, not that it matters though.
I rarely post there, and I know why.
The audio world is full of misconception by hobbyists, audiophiles, and the forum "experts".