It wasn't until the 104th minute that Bayern finally sealed the win, thanks to a header from substitute Javi Martinez.
"The manager and both players immediately left the stadium and have returned home," read a club statement.
"Bryan Reynolds has flourished whenever he has gotten an opportunity," the club's president Dan Hunt said in a club statement. "He has a bright future and we're thrilled that he'll continue to grow with us at FC Dallas and at the national team level."
Shenhua doubled the lead eight minutes after the break when Peng's header found Bi Jinhao, who resisted a shoulder-to-shoulder challenge in the box to drill home.
Ibrahimovic had the chance to complete his hat-trick in the 63rd minute, but he ballooned the ball over the bar with the goalkeeper well beaten.
The club insisted that their measures and protocols around COVID-19 remain stringent. They even offered to test the Hull City team ahead of Tuesday's fixture, but the visitors declined the offer.
Racing moved to second in Group F, three points behind leaders Nacional of Uruguay. Alianza Lima occupy last place, having failed to pick up a point from four matches.
Chinese naturalized player Ai Kesen, known as Elkeson in Brazil, put the Guangzhou side 1-0 ahead in the 14th minute with a penalty kick.
"The stadium has been designed to respect and preserve the heritage of the area, while bringing a long-standing semi-derelict dockland site back into productive use," added the spokesperson.
Wagner's time in Gelsenkirchen might soon expire as it seems only a win against Werder Bremen this Saturday evening can save him from being sacked.
Danny Ings put Southampton ahead after half an hour and Spurs looked slow until Son equalized after an assist from Harry Kane two minutes into first half injury time.