Could Debug toolbar disable instrumentation earlier?

[x-yuri]

I've run into issue with Request history panel. It calls generate_stats of every panel while processing response. The instrumentation has not been disabled, as a result SQL panel records extra queries triggered by Request panel (session data). Then in Debug toolbar I see, "1 query in x ms". But when I open the panel, I see no queries. Supposedly because Request history panel provides stats for other panels and by the time SQL panel got to generate stats no extra queries were executed.

[jgbishop]

This may not 100% related, but I know that Request History has to jump through some hoops to get around the fact that DDT disables AJAX support. Some of the strange bootstrapping that Request History does to reenable support may be part of the reason why things aren't shutting down at the right time.