The champions have a two-point lead at the top of the table, but Ancelotti felt his team were not alert enough and said he will consider changes for Wednesday's Champions League game against PSV.
Aiming to bounce back from a 1-0 defeat in the Champions League against Atlético Madrid and a 1-1 draw against Cologne before the global break, Ancelotti's side came up short once again but remain top of the Bundesliga table, two points clear of Cologne.
Arjen Robben put the champions ahead after 11 minutes when he found space on the right of the penalty area and fired in from a tight angle. But Frankfurt levelled in the 78th minute when Marco Fabian turned in Timothy Chandler's cross shot with his chest as frustrated Bayern, who won its first five games, drew for the second match in a row.
Cologne moved up to second behind Bayern thanks to a 2-1 win over struggling Ingolstadt, which extended their unbeaten start to the season to seven games.
The attacking duo have dominated the league's goalscoring charts for the last three years.
It was Frankfurt's first goal against Bayern since 2011.
The result saw Ingolstadt drop to the bottom of the table, replacing Hamburg, who picked up a point in a goalless draw at Borussia Mönchengladbach.
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The two Minnesota pipelines are run by the energy company Enbridge, which took to Twitter to condemn the protests as unsafe . According to Laney, the sheriff's office was notified around 7 a.m. local time that three people were on private property.
French striker Anthony Modeste scored both goals in the first-half including a converted penalty in a 2-1 win at Ingolstadt, for whom Lukas Hinterseer netted a late penalty.
Gladbach seemed to be in the driving seat when Hamburg's Brazilian defender Cleber gave away a penalty and was sent off in the 25th minute, but Andre Hahn's spot kick was brilliantly saved by Rene Adler.
For the first time in the Bundesliga, goal-line technology was used to validate Nabil Bentaleb's 65th-minute goal, which put the visitors in front.
Andrej Kramaric was the hero for unbeaten Hoffenheim with a late victor from the penalty spot, just minutes after Florian Niederlechner had cancelled out Sandro Wagner's first half goal.
However, Daniel Baier hammered a shot into the top corner with 12 minutes left to rescue a point for the home side and leave Schalke down in 15th.
Hakan Calhanoglu's first-half header was cancelled out by goals from Bremen's Zlatko Junuzovic and Ousman Manneh.
There was more bad news for Markus Weinzierl's side when it was confirmed after the game that record signing Breel Embolo, a Swiss worldwide striker, had fractured an ankle.