There is no pre-battle timer inside targets.
As of 07:30 ET Tuesday November 10, the affected targets include simple cargo, titanium resource, uranium resource, tlc campaigns, subsector bases and possibly more. In all of the listed targets the battle begins instantly or prior to entering.
The only place I see the hint of a timer is PvP base attacks. There I see a timer waiting for other player to start battle.
That is not normal behavior for such, rather it looks more like a co-op target entry start. While I have read:
Either the problem continues or has returned.
"a computer once beat me at chess but it was no match for me at kick boxing"